I am extending a seam-gen crud app to a simple multi directory app.

Windows XP config:
jboss-4.2.2.GA + jboss-seam-2.0.0.GA + MySQL Server 4.1 + mysql-connector-java-3.0.17

Until now I was using my configuration in development mode with local client and thought it'd be better to check on client-server reliability before going on developing a multi-user app. With the \jboss-4.2.2.GA\bin\run.bat -b ipnumber arguments I could reach the server from within the LAN.
Strangely and disturbingly enough the JBoss AS hangs on practically every error that occurs in my Seam code and all clients are unable to proceed. Any similar experiences or hints on causes/solutions?