could not dereference object when running the EJB

Hi,
I'm using jboss4.0.3. I want to reference my jsp page to EJB but get a "could not dereference object" upon running the jsp with this as it went into the catch exception instead of looking up to the EJB:

Part of my jsp codes in jspinit( ):
try {

objref = initial.lookup("java:comp/env/ejb/MyMusicCart");
System.out.println("lookup success for ejb/MyMusicCart");
// a reference to the home interface is shareable
cartHome = (MusicCartHome)PortableRemoteObject.narrow(objref, MusicCartHome.class);
System.out.println("created MusicCartHome object");

} catch (Exception ex) {
System.out.println("Unexpected Exception: " +ex.getMessage());


My web.xml
Code:

<ejb-ref>
<ejb-ref-name>ejb/MyMusicCart</ejb-ref-name>
<ejb-ref-type>Session ]]>asg.MusicCartEJB.MusicCartHome ]]>asg.MusicCartEJB.MusicCart </remote>
<ejb-link>ejb-jar-ic.jar#MusicCartBean</ejb-link>

</ejb-ref>



anyone encounter this problem before? Please help.. I have attach the jsp file, web.xml file and a bean xml *.jar for your perusal.
I can produce more of my files if you guys feel that is not enough