Installation Problem 500 error

I am looking forward to trying out OpManager, but I cant seem to get past this problem. i have a Windows 2003 server, up to date with all the service packs etc. I install Opmanager, and it seems to install correctly, when I try to run the web client, I am told that port 8080 is in use and my new port is 8060... fine ... If I open a browser window and connect to //localhost:8060 I get an Internal Server Error (500) with the following : The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, admin@india.adventnet.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.
Apache/2.0.47 (Win32) mod_jk/1.2.5 Server at localhost Port 8060

I have checked all the documentation I can find and am not able to find a resolution.. any help would be greatly appreciated.

Many Thanks

Dave