classes12.zip should be in you server's classpath if you are accessing from a Web app. Go to server perspective, make sure the server configuration window is open, under the Servers folder, double click on the appropriate server. When the editor comes up, click on paths and set the classpath appropriately. To set up connection pooling, click the Data Source tab. Making sure the zip file is in the build path will only work for a java project where the build path is considered the "run-time" path as well.
No more rhymes! I mean it!<br /> <br />Does anybody want a peanut?