To see the jars that are needed, look at your project in the Project Explorer or Package Explorer. You will see a classpath library entitled JDBC Mediator Library, which is used to enable you to work with your applications at development time. If you expand the classpath library node, you can see the jars that are required for that library, as well as their path on the disk. Make sure that copies of these jars available to your target server.
To determine which jars are used at development time, select Properties from your project's context menu and then select JDBC Connections from the property page. Select your desired connection, and in the Runtime connection details section, click the Edit button. This displays your connection details, including the jars needed for the Class Location. Alternatively, you can choose to use a data source connection, in which case you will need to ensure that the required data source has been set up on your target server.