One possible issue might be that until recently,
the virt server was not able to deal with Spring-based
apps. Are you also using Spring?
What build are you on? If this is the underlying issue,
the easiest way to test it is to try a recent build from HEAD;
Spring support is in HEAD now, and also in the very latest 2.0E.
Most importantly, what are you seeing in your log files?
Have you turned on debugging also?
More information would be useful.