Hi Sonx,
well, to be quite honest I used to use WAS 6.1 and now i'm going deep into WAS 8, so I'm not very expert on WAS 7... nevermind, websphere versions are very well retro-compatibles, so I think that there would be not many differences in deployment descriptors...
Now, with wich
IDE do you develop your EJBs ? Do you use Rational ? If yes, what happens if your validate your ejb project ? If you open with the visual editor the ejb.xml (with 'visual editor' i mean the prospective that help you in seeing declared ejbs, interfaces, transactional behaviour and so on) can you see the missing ejbs ?