migrating to struts 1.1

[e]

I am trying to migrate my 1.0 app to 1.1.

As far as I can tell, I have made the necessary updates/changes.  However, 
when I deploy and try to call up an action, I get the exception below.
I am deploying to Silverstream 3.7.  Any insight?

Exception Information

com.sssw.shr.http.AgoServletExceptionjava.lang.NullPointerException
----------
Stack Trace

java.lang.NullPointerException
        at 
org.apache.struts.action.ActionServlet.getRequestProcessor(ActionServlet.java:854)
        at 
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
        at 
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at 
com.sssw.srv.resources.AgWarResource.doServletDispatch(AgWarResource.java:950)
        at 
com.sssw.srv.resources.AgWarResource.service(AgWarResource.java:727)
        at 
com.sssw.srv.resources.AgWarURLResource.perform(AgWarURLResource.java:114)
        at com.sssw.srv.http.httpd.perform(httpd.java:4702)
        at com.sssw.srv.http.Client.processRequest(Client.java:907)
        at com.sssw.srv.http.Client.loop(Client.java:1278)
        at com.sssw.srv.http.Client.runConnection(Client.java:1495)
        at com.sssw.srv.http.Client.run(Client.java:1442)
        at java.lang.Thread.run(Unknown Source)



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