I am looking at possible ways to use tcServer to replace an existing legacy Java Container solution that we have in place. One of the feature I would like to keep is the use of an "Invoker" servlet. When I enable this servlet and the corresponding mapping on web.xml, the tcServer throws up the following Security Exception when accessed:

java.lang.SecurityException: Servlet of class org.apache.catalina.servlets.InvokerServlet is privileged and cannot be loaded by this web application

I noticed that the Springsource catalina.jar contains a bit different "InvokerServlet.class" compared to the one from Apache. I looked around to see if the access to the invoker servlet was switched off explicitly in one of tcserver config files but I couldn't find anything. Is anybody aware if its possible to turn this on? Your help will be greatly appreciated.
Thanks,
Mo Abdulla