Problem connecting to JDBC 7.0-1.2 driver

Hi..

I've installed JDK 1.2.2 from RPM's into my Red Hat 7.0 System which has
Postgresql 7.0.2 installed.

1. I've copied the jdbc7.0-1.2.jar file to the postgresql.jar file.
2. my classpath includes /usr/lib/pgsql/postgresql.jar
3. Whenever i run a java program to connect, i get an SQLException: No
Driver Found.
4. My postmaster is running with the -i option.

What could be the problem??

Thanks

Raman.