Im having the same problem for JBossAOP with Eclipse. but i was able to successfully implemet a sample using ANT build. try to get down a sample which runs using ANT. hope this will help.
Are you guys using version 1.4 Milstone 3 of the IDE?
I'm not 100% sure, but I think it will only work with Eclipse 3.0.1
Once you get familiar with how JBoss AOP works, editing pointcuts by hand/using ant is definitely more powerful at this stage
Thank you for your advices , i'll try the ant next time