I've got a problem with debugging EJB on J2EE 1.4 with IntelliJ IDEA 3.0.1. I run J2EE Application Server in debug mode and attach to the server from IDEA. The result is: only breakpoints on method calls can be set. Other breakpoins marked with cross (invalid). String "debug information is unavailable" in debug window. (Check box to generate debug information is "on"). How I can resolve the problem?