Update: a new serialVersionUid has appeared when i started cutting out .jars however this could have been caused by other things as well, i thought maybe eclipse was causing the problem so i started another project with just my client in it, and set up a jar file (the exact same one that deploys on the server) as a user library and import the com.sessionDB from there. still no luck and i have the second serialVersionUID still appearing. any suggestions would really help because I have run out of ideas to test for. Thanks View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4127579#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...