Umm, how exactly is Eclipse showing you data sources, through some kind of admin console? Either way, most (all?) admin consoles will *not* show you the tables. That's what you have SQL clients for. Try searching google for a sybase sql client.
Bruno, I don't think Scott meant you were doing it the wrong way in Eclipse. I think he wanted to know how you were doing it in Eclipse because he didn't know of any way to do it. I might be wrong about that, but I think I'm right because I don't know how you use Eclipse to do it either. So... again... what do you do in Eclipse which shows you database schemas?
It sounded like he was accessing his J2EE server inside an eclipse window. Either way, you should use a database SQL tool for sybase to access it directly.