I'm having that same problem but I am using SQL Developer 3.1.07. It is funny. I can connect to one of our Sybase databases just fine with no issue. But when I try to connect to the other one I'm geeting the same JAVA error that lili5059 is getting. The connection works fine. I get the JAVA error when it is trying to return back the datbase lists. I am using the JTDS 1.2 jar file. Any thoughts or advice that you can give me would be appreciated.
Thanks,