connecting to oracle database 9i,10gr2,11gr2

Im newbie to servoy. I just knew about it on oracle OTN forum…

But my problem is to connect it to the oracle database servers.

URL—>> jdbc:oracle:thin:@128.224.2.88:1521:his
Driver —>>oracle.jdbc.driver.OracleDriver
oracle.jdbc.OracleDriver

But i can connect with Jdeveloper with this given parameters.

I got this error while connecting to existing database.

An internal error occurred during: “Loading servers/tables needed by current solution”.
oracle/dms/instrument/ExecutionContextForJDBC.

Any help?

Thank you…
Charles