I got the same error msg as yours. Do you know how to fix it?
Add jboss-common-client.jar to your classpath.
Any idea where SerialVersion disappeared in JBoss 4.0.5 GA? ...
It was used to allow 4.0.x hosted clients to invoke EJBs in 3.2.x (<3.2.8) beans, through the use of -Dorg.jboss.j2ee.LegacySerialization.
Now there is no mention of such a flag in the code, and thus I'm having problems getting my 4.0.5 GA hosted client to connect without serialization exceptions to a 3.2.6 container (due to serialVersion incompatibilities).
It is not in lib/jboss-common.jar ?