HELP! Não consigo acessar o método exclui (Bean) via form JSF. URGENTE! Não sei mais o que tentar

Front-end
#1

Galera desculpa, mas preciso urgente de ajuda. Não consigo acessar o método exclui. Não acho erro nenhum, clico no link e não acontece nada. Por favor, ajudem…

index.jsf

<html> <f:view> <head> <f:loadBundle basename="br.com.integrator.cap15.jsf.mensagens" var="msgs" /> <title> <h:outputText value="#{msgs.Titulo1}"/> </title> </head> <body> <h:form> <!-- //value = propriedade do backbean que retorna uma lista. var = nome referenciar itens da lista --> <h:dataTable value="#{agenda.lista}" var="dados" border="1"> <h:column> <f:facet name="header"> <h:outputText value="#{msgs.Cod}"/> </f:facet> <h:outputText value="#{dados.cod}"/> </h:column> <h:column> <f:facet name="header"> <h:outputText value="#{msgs.Titulo}"/> </f:facet> <h:outputText value="#{dados.titulo}"/> </h:column> <h:column> <f:facet name="header"> <h:outputText value="#{msgs.Link}"/> </f:facet> [b] <h:commandLink value="Excluir" action="#{agenda.exclui}" > <f:setPropertyActionListener value="#{dados.cod}" target="#{agenda.cod}" /> </h:commandLink>[/b] </h:column> </h:dataTable> </h:form> </body> </f:view> </html>

AgendaBean.java

[code]public class AgendaBean {
private String cod;
private String titulo;
private Connection conn;
public void abrirConexao()
throws SQLException,
NamingException,
ClassNotFoundException
{
if (conn != null) return;
Class.forName(“org.gjt.mm.mysql.Driver”);
conn = DriverManager.getConnection(“jdbc:mysql://localhost/bdlivros2”,“root”,“senha123”);
}

public Result getLista()
        throws SQLException,
        NamingException,
        ClassNotFoundException
{
    try{
        abrirConexao();
        Statement stmt = conn.createStatement();
        //stmt.executeUpdate("INSERT INTO livros(Cod, Titulo) VALUES (1, 'Weeeb') "); inserindo ok
        //stmt.executeUpdate("DELETE FROM livros WHERE cod=12333"); excluindo ok
        ResultSet result = stmt.executeQuery("SELECT * from livros");
        return ResultSupport.toResult(result);
    }finally{
        fecharConexao();
    }
}

public String exclui() throws SQLException, NamingException, ClassNotFoundException {
String result = “erro”;
try {
abrirConexao();
Statement stmt = conn.createStatement();
stmt.executeUpdate(“delete from livros where cod = '” + cod + “’”);
stmt.close();
result = “ok”;
} catch (SQLException e) {
System.err.println ("Erro: "+e);
result = “erro”;
}
return result;
} 

public void fecharConexao() throws SQLException{
    if (conn == null) return;
    conn.close();
    conn = null;
}

}

[/code]

faces-config.xml

<faces-config version="1.2" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_1_2.xsd"> <managed-bean> <managed-bean-name>agenda</managed-bean-name> <managed-bean-class>br.com.integrator.cap15.jsf.AgendaBean</managed-bean-class> <managed-bean-scope>session</managed-bean-scope> </managed-bean> </faces-config>

#2