I am presently attempting to install dotCMS for an existing tomcat installation. I have removed the war and dropped it into /webapps/ROOT in tomcat. I have edited the ROOT.xml file to suggest towards the MySQL database I've setup known as dotcms. When beginning tomcat, the database is produced by dotCMS which seems fine. When attempting to login however, I get the next error:

24-Nov-2011 10:46:40 org.apache.catalina.core.ApplicationContext log
SEVERE: Error loading WebappClassLoader
  context: 
  delegate: false
  repositories:
    /WEB-INF/classes/
----------> Parent Classloader:
org.apache.catalina.loader.StandardClassLoader@1af33d6
 org.apache.jsp.index_jsp
java.lang.ClassNotFoundException: org.apache.jsp.index_jsp
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1095)
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:470)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Thread.java:619)

I'm able to only assume it's missing a jar or otherwise searching within the correct place?

Hopefully someone can shed some light on that one for me personally.

Thanks!