I have this method defined in my Bean Class. My Bean is an Stateless Session with Bean Managed Transaction. When I call it from my client, it doesn't pass the line when I get the first Connection. And it does not make the changes (NO COMMIT)

Any idea why is my Transaction stopped in this place? Is there anything wrong in the definition of my Session? Or in the definition of my informix-xa-service.xml?

public void getUsers()
{
try
{
InitialContext initCtx = new InitialContext();
UserTransaction ut = ejbContext.getUserTransaction();

DataSource ds1 = (javax.sql.DataSource) initCtx.lookup("java:/Informix1XaDS");
DataSource ds2 = (javax.sql.DataSource) initCtx.lookup("java:/Informix2XaDS");

ut.begin();

Connection con1 = ds1.getConnection("sisa", "sisa");
Connection con2 = ds2.getConnection("sisa", "sisa");

Statement st1 = con1.createStatement();
Statement st2 = con2.createStatement();

st1.executeUpdate("update j01usuario set descripcion='TEST EJB1' where usuario='PEPE'");
st2.executeUpdate("update j01usuario set descripcion='TEST EJB2' where usuario='PEPE'");

st1.close();
st2.close();
con1.close();
con2.close();

ut.commit();

} catch (Exception e) {e.printStackTrace();}
}