I'm running jboss 4.0.3SP1

I assumed this would be a common issue but have not found anything after searching the web and this forum.

I have a standard installation of jboss with my .war application deployed into it.
When I touch web.xml to refresh my web tier classes I lose the session.

I have tried adding

<distributable/>

the the web.xml but that did the same thing though it did give me this error:

session is dirty. Will increment version from: 3

Is session saving supported in jboss ?
How to I configure my application to save the HttpSessions under jboss ?

Thanks in advance.