UnavailableException for Struts RequestProcessor

I posted a thread several months back with an issue deploying a 10.1.2 adf application to a 9.0.4.0.1 server and never had it resolved.
When I look in the log file, I see a message that the Struts RequestProcessor is unavailable. The message looks like this:
Jul 27, 2005 6:50:43 PM org.apache.struts.action.ActionServlet
SEVERE: javax.servlet.UnavailableException: Cannot initialize RequestProcessor org.apache.struts.action.ActionServlet
ClassNotFoundException
I'm assuming this is happening on startup of the application when it reads the web.xml file and is attempting to load the actionservlet. The struts.jar file is in the WEB-INF/lib path.
We tried moving it around, then examined an application.log file and it says it cannot be found in <long path here>web-inf/classes/org/apache/struts/action/ActionServlet.class, nor in <long path here>/WEB-INF/lib/, in a classpath defined in orion-web.xml nor in a global application path.
We tried putting it in the oc4j folder for this app in the applib folder, and tried adding an entry in the orion-web.xml file <classpath path="path to jars"/>
but that did not seem to work either.
The application runs as slow as molasses in January, maybe slower on 9.0.4.0.1, but runs fine in 10.1.2. WE thought this might have something to do with it, but I have no idea how to resolve it at this point. We cannot move to 10.1.2 as 10 other apps run on this server and we're not planning any migration at this point.
Please, please share your thoughts, talents, advice on this!!

I found the error here from home in another thread:
Servlet error: Error instantiating servlet 'action' (servlet class not found, make sure it exists at C:\oc4j\j2ee\home\applications\myappname/WEB-INF/classes/org/apache/struts/action/ActionServlet.class, in a jar in C:\oc4j\j2ee\home\applications\myappname/WEB-INF/lib/, in an orion-web.xml specified classpath or global server classpath)

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