Using Struts-Framework on WAS 6.30

Hello,

I have a web app with struts. But after deploying there's an exception:

java.lang.NoClassDefFoundError: org/xml/sax/SAXParseException

So I try to deploy the application with the sapxmltoolkit.jar, xerces.jar (1.3.1), and so on. Then there's an other exception:

java.lang.LinkageError: loader constraints violated when linking org/xml/sax/SAXParseException class

Can anybody help me?

Thanks!