does hibernate+sqlite+tomcat work?

I have an urgent problem:

I have a jar which contains a hibernate+sqlite project (It does simple operations on a db).

I have included this jar in a web project and created a web service which creates an instance of a class from the jar.

The web service is on a Tomcat 6 server.

But when I call the WS's method, it stops execution when trying to create the object. And the crazy thing is that it doesn's show any开发者_C百科thig in the console. The jar has logging and it works when called from a regular java project.

The jar and WS work fine when are used separately. It may be a simple solution but since the logging doesn't work I can't find out what's wrong?

Any solution would be great (logging, classpath?).