I get a Http 500 Error in connection with Java and Tomcat when trying to add an account (i dont even get the webpage opening i just get the error)

I have rebooted the Server & Services (still cant get it to open the page when i click add account).

 

email to dwh@tandc.co.uk please.

 

applied all service patches up to dat and still get

 

Error while processing the request.
Try Home Page.

 

from the drop down or new account tab.

 

any ideas anyone.