Java EE (Java Enterprise Edition) General Discussion

Using Tomcat 5.0.29.
Without changing server.xml Tomcat loads fine.
When I change the server.xml to point to my WebApps directory it gives a long list of errors in the box that pops up. The first error that i can read is "C:/.../webapps/balancer does not exist or is not a readable directory" there is also a "Parse error in application web.xml - IllegalArgumentException. Invalid <url-pattern> AServlet in servlet mapping"
I can still see html and jsp pages after Tomcat loads but when i try to run a servlet it gives me a 404 resource not available error.

Any ideas...??