In a J2EE environment, all of the required Java™ libraries should be available. You might need to ensure that your J2EE server adds the following delivered jar files to your class path. These files are in the <install_path>\classes subdirectory:
JAAS is included with IBM® JREs and JDKs by default. The JTA library is available from the Sun Java website.
All of the above libraries and extensions should be available from the J2EE server libraries.