can't load application resources

["Phillips, George H." <gh...@miami.edu>]

I'm suddenly having a problem with the struts-example application under
Tomcat and Struts 20000914 running under Win2000.
  
- The initial jsp page produces an internal servlet error: 
javax.servlet.ServletException: Missing resources attribut
org.apache.struts.action.MESSAGE

- not surprisingly then, servlet.log contains the following: 
Context log path="/struts-example" :action: Cannot load application
resources bundle org.apache.struts.example.ApplicationResources

The totally weird thing is that this application worked fine for a number of
weeks.  I assume I accidentally changed something somewhere while working on
a another app I'm developing under Struts/Tomcat (the other app has the same
problem).  I guess my question is where do I start debugging this problem?
I know that ApplicationResources.properties exists in the
org.apache.struts.example directory - the file and directory permissions
seem ok - what would prevent a struts app from finding this file all of a
sudden, especially when no jsp or other class code appears to have been
changed? 

Any help, advice, tip, directive or pointing out of obvious blunders would
be much appreciated...

George Phillips