Java and JavaScript in the Database

Hello,
I want to access a remote MS Access database from oracle stored procedures.

Does anyone know how i can load the RmiJdbc driver using the loadjava command or with any other way.
Because when i try to load RmiJdbc.zip using the loadjava command I am getting the error:

ORA-29533:attempt to overwrite class or resource string while defining or compiling scott.TestClient

this error is occured for multiple files...

I don't know how to delete this classes.
Because this error occured and the first time i tried to load Rmijdbc driver.
and when i use the dropjava command to drop it,and then load it again the same error occures.


Can anyone help me how to load this driver?

Please answer because i need it as soon as possible.

Thanks