Your jar file must be under:
Yes, we have our jar files under <JBoss home>/server/default/deploy but it does not works. We only get an error with javax.naming...
How do you configure JBoss in JBuilder? We think it is easy, but our problem is with JBoss we hope.
If you are getting errors post the exception with its message ans stack trace.
Have you tried deploying your component without JBuilder?
Have you checked JNDIView to see that your component is bound where you think that it should be?
Are there any deployment errors deploying your component?