Java EE (Java Enterprise Edition) General Discussion

Hi all,
I am quite new to struts and have, perhaps a quite stupid error.
Until now a used Struts 1.2.9 (because my IDE had it onboard). Now I
want to use some features of the version 1.3.8 and moved to this version
that for.
But now I have a strange error while starting Jboss server
The error looks like:

Unable to initialize Struts ActionServlet due to an unexpected
exception or error thrown, so marking the servlet as unavailable. Most
likely, this is due to an incorrect or missing library dependency.
java.lang.NoClassDefFoundError:
org/apache/commons/chain/config/ConfigParser
at
org.apache.struts.action.ActionServlet.initChain(ActionServlet.java:1680)
..................

Can anyone help me to solve this problem?

Thanks