loading resources from jar in WebSphere Application Server V5.1

Hi All,

I've got problems reading resource files from jar files in WebSphere 
Application Server V5.1. I bundled two EJB jars and some utility jars in 
an EAR file. When I start the deployed application in WebSphere it ends 
upnormal because the constructor of a session EJB throws a 
NullPointerException. The constructor creates an instance of a utility 
class. This utility class trys to read a XML file from the jar it is 
bundled in and the URL of the resource is alway null.

In JBoss 3.2.3 everything works fine.

Example:

Jar-File-Structure:

com/asap/shaire/server/print/FopController
conf/Config.xml

I tried different ways to get the URL of the resource "conf/Config.xml" in 
the consturctor of the FopController class.

1. URL file = FopController.class.getResource("conf/Config.xml");

2. URL file = 
Thread.currentThread().getContextClassLoader().getResource("conf/Config.xml");

3. URL file = ClassLoader.getSystemResource("conf/Config.xml");


No statement of the three stated works. Has anybody a solution for reading 
resources from jar files in WebSphere Application Server?


Thanks and regards
Mattias