classcast exception after jaas login, while context lookup

Please refer discussion:

top of stack:
13:09:50,058 INFO [STDOUT] java.lang.ClassCastException
13:09:50,058 INFO [STDOUT] at org.jboss.util.property.PropertyMap.remove(PropertyMap.java:198)
13:09:50,058 INFO [STDOUT] at org.jnp.interfaces.NamingContext.getEnv(NamingContext.java:1299)
13:09:50,074 INFO [STDOUT] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:526)
13:09:50,074 INFO [STDOUT] at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:520)
13:09:50,074 INFO [STDOUT] at javax.naming.InitialContext.lookup(InitialContext.java:347)
13:09:50,074 INFO [STDOUT] at jmail.ejb.util.MailerEnterpriseFactory.getRemoteHome(MailerEnterpriseFactory.java:151)
13:09:50,090 INFO [STDOUT] at jmail.ejb.util.MailerEnterpriseFactory.getMailAccountHome(MailerEnterpriseFactory.java:100)

description:
I am getting this error after a successful anonymous/nobody login., and when i run a method findAll to fetch all CMP beans. it fails to get the remote home interface, whilst method context.lookup().

I dont get this bug if i set up jaas from eclipse workbench workspace, and do a lookup., findAll, and it returns all remote ejb proxies.