PSQLException: ERRO: relação "bancos" não existe

hibernate.dialect org.hibernate.dialect.PostgreSQLDialect
hibernate.connection.driver_class org.postgresql.Driver
hibernate.connection.url jdbc:postgresql://localhost/banco
hibernate.connection.username postgres
hibernate.connection.password suasenha

package br.com.audcont.conversor.dao;

import br.com.audcont.conversor.to.Banco;
import br.com.audcont.conversor.to.LancamentoImportado;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;

public class HibernateUtility {

    private static SessionFactory factory;
    private static AnnotationConfiguration aC;

    static {
        try {
            aC = new AnnotationConfiguration();
            aC.setProperty("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");
            aC.setProperty("hibernate.connection.driver_class", "org.postgresql.Driver");
            aC.setProperty("hibernate.connection.url", "jdbc:postgresql://localhost/sistemas");
            aC.setProperty("hibernate.connection.username", "postgres");
            aC.setProperty("hibernate.connection.password", "postgres");
            aC.setProperty("hibernate.show_sql", "true");
            aC.setProperty("hibernate.format_sql", "true");
            aC.setProperty("hibernate.c3p0.acquire_increment", "1");
            aC.setProperty("hibernate.c3p0.idle_test_period", "100");
            aC.setProperty("hibernate.c3p0.min_size", "10");
            aC.setProperty("hibernate.c3p0.max_size", "100");
            aC.setProperty("hibernate.c3p0.max_statements", "0");
            aC.setProperty("hibernate.c3p0.timeout", "100");
            aC.addAnnotatedClass(Banco.class);
            aC.addAnnotatedClass(LancamentoImportado.class);
            factory = aC.buildSessionFactory();
        } catch (Exception e) {
            e.printStackTrace();
            factory = null;
        }
    }

    public static Session getSession() {
        return factory.openSession();
    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package br.com.audcont.conversor.to;

import java.io.Serializable;
import java.util.List;
import javax.persistence.Basic;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.OneToMany;
import javax.persistence.Table;

/**
 *
 * @author Dassayev Barbosa
 */
@Entity
@Table(name = "BANCOS", schema="carajas")
@NamedQueries({
    @NamedQuery(name = "Banco.findAll", query = "SELECT b FROM Banco b"),
    @NamedQuery(name = "Banco.findById", query = "SELECT b FROM Banco b WHERE b.id = :id"),
    @NamedQuery(name = "Banco.findByNome", query = "SELECT b FROM Banco b WHERE b.nome = :nome")})
public class Banco implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Basic(optional = false)
    @Column(name = "ID")
    private Long id;
    @Basic(optional = false)
    @Column(name = "NOME")
    private String nome;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "idBanco")
    private List<LancamentoImportado> lancamentoImportadoList;

    public Banco() {
    }

    public Banco(Long id) {
        this.id = id;
    }

    public Banco(Long id, String nome) {
        this.id = id;
        this.nome = nome;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getNome() {
        return nome;
    }

    public void setNome(String nome) {
        this.nome = nome;
    }

    public List<LancamentoImportado> getLancamentoImportadoList() {
        return lancamentoImportadoList;
    }

    public void setLancamentoImportadoList(List<LancamentoImportado> lancamentoImportadoList) {
        this.lancamentoImportadoList = lancamentoImportadoList;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof Banco)) {
            return false;
        }
        Banco other = (Banco) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "br.com.audcont.conversor.to.Banco[id=" + id + "]";
    }

}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package br.com.audcont.conversor.to;

import java.io.Serializable;
import java.math.BigDecimal;
import java.util.Date;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.NamedQueries;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;

/**
 *
 * @author Angelika
 */
@Entity
@Table(name = "LANCAMENTOS_IMPORTADOS", schema="carajas")
@NamedQueries({
    @NamedQuery(name = "LancamentoImportado.findAll", query = "SELECT l FROM LancamentoImportado l"),
    @NamedQuery(name = "LancamentoImportado.findById", query = "SELECT l FROM LancamentoImportado l WHERE l.id = :id"),
    @NamedQuery(name = "LancamentoImportado.findByData", query = "SELECT l FROM LancamentoImportado l WHERE l.data = :data"),
    @NamedQuery(name = "LancamentoImportado.findByValor", query = "SELECT l FROM LancamentoImportado l WHERE l.valor = :valor"),
    @NamedQuery(name = "LancamentoImportado.findByNumeroCheque", query = "SELECT l FROM LancamentoImportado l WHERE l.numeroCheque = :numeroCheque"),
    @NamedQuery(name = "LancamentoImportado.findByHistorico", query = "SELECT l FROM LancamentoImportado l WHERE l.historico = :historico")})
public class LancamentoImportado implements Serializable {
    private static final long serialVersionUID = 1L;
    @Id
    @Basic(optional = false)
    @Column(name = "ID")
    private Long id;
    @Column(name = "DATA")
    @Temporal(TemporalType.DATE)
    private Date data;
    @Column(name = "VALOR")
    private BigDecimal valor;
    @Column(name = "NUMERO_CHEQUE")
    private String numeroCheque;
    @Column(name = "HISTORICO")
    private String historico;
    @JoinColumn(name = "ID_BANCO", referencedColumnName = "ID")
    @ManyToOne(optional = false)
    private Banco idBanco;

    public LancamentoImportado() {
    }

    public LancamentoImportado(Long id) {
        this.id = id;
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Date getData() {
        return data;
    }

    public void setData(Date data) {
        this.data = data;
    }

    public BigDecimal getValor() {
        return valor;
    }

    public void setValor(BigDecimal valor) {
        this.valor = valor;
    }

    public String getNumeroCheque() {
        return numeroCheque;
    }

    public void setNumeroCheque(String numeroCheque) {
        this.numeroCheque = numeroCheque;
    }

    public String getHistorico() {
        return historico;
    }

    public void setHistorico(String historico) {
        this.historico = historico;
    }

    public Banco getIdBanco() {
        return idBanco;
    }

    public void setIdBanco(Banco idBanco) {
        this.idBanco = idBanco;
    }

    @Override
    public int hashCode() {
        int hash = 0;
        hash += (id != null ? id.hashCode() : 0);
        return hash;
    }

    @Override
    public boolean equals(Object object) {
        // TODO: Warning - this method won't work in the case the id fields are not set
        if (!(object instanceof LancamentoImportado)) {
            return false;
        }
        LancamentoImportado other = (LancamentoImportado) object;
        if ((this.id == null && other.id != null) || (this.id != null && !this.id.equals(other.id))) {
            return false;
        }
        return true;
    }

    @Override
    public String toString() {
        return "br.com.audcont.conversor.to.LancamentoImportado[id=" + id + "]";
    }

}

@OneToMany(cascade = CascadeType.ALL, mappedBy = "banco")

@OneToMany(targetEntity=LancamentoImportado.class ,cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "banco",orphanRemoval=true)

@OneToMany(targetEntity=LancamentoImportado.class ,cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "banco",orphanRemoval=true)	
public List<LancamentoImportado> lancamentoImpotados;
// getters, setters e construtor preenchido
public Banco {
}

@ManyToOne
	private Banco banco;
//getters, setters e construtor preenchido
public LancamentoImportado {
}