Session bean calls enttity bean got error !!!! *urgent*

Question

i have a session bean(customerController)with jndi(ejb/customer) calling entity bean (customer).Both using remote interface. when i build a frame application to test these beans. i get the error below.
can anybody tell me wat happen ?!!
23:20:22,861 ERROR [LogInterceptor] EJBException: javax.ejb.EJBException: removeCustomer: null      at sessioncallsentitybean.CustomerControllerBean.createCustomer(CustomerControllerBean.java:63)      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)      at java.lang.reflect.Method.invoke(Method.java:324)      at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:660)      at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:186)      at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:77)      at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:107)      at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:237)      at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:98)      at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:130)      at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:208)      at org.jboss.ejb.StatelessSessionContainer.invoke(StatelessSessionContainer.java:313)      at org.jboss.ejb.Container.invoke(Container.java:738)      at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)      at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke
(JRMPInvoker.java:383)      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)      at java.lang.reflect.Method.invoke(Method.java:324)      at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)      at sun.rmi.transport.Transport$1.run(Transport.java:148)      at java.security.AccessController.doPrivileged(Native Method)      at sun.rmi.transport.Transport.serviceCall(Transport.java:144)      at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)      at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)      at java.lang.Thread.run(Thread.java:536)

Answer 1

seems like the logic stops when session bean is trying to create an instance of entity bean. i ve set my jndi name (ejb/Customer)correctly in the naming code part in session bean. Can u tell me wat steps that i might have missed. pls. thank you so much. =)
session bean manages to pass through methods below:
ejbCreate ()
createCustomer()
makeConnection()
releaseConnection()... but throws the EJBException
public String createCustomer(String custName, String custEmail, String custAddress, String custGender, String custPhoneNo) throws CreateException {
     System.out.println("CustomerControllerBean createCustomer");
    try{
      makeConnection();
      customer = customerHome.create(customerId, custName,
                 custEmail, custAddress, custGender, custPhoneNo);
      releaseConnection();
    } catch (Exception ex){
      releaseConnection();
      throw new EJBException
      ("createCustomer: " + ex.getMessage());
    return customerId;
  }my error is "javax.ejb.EJBException: createCustomer: null" the rest of the error warning is mentioned in the first posted message above.