Windows installation - cannot be configured - jobs page loading shown

[Kenneth]

Hi Guru's
I'v jeg trying to konfigure my jenkins to have a job monitoring three of 
several projects checked into subversion.
and build it with ms build. (using .net 2.0 & c#)
after that I would like to run NUnit test on a project.
 
But when I try to configure the job, the top of the page is grayed out, and 
states that it is loading.
 
anybody have a clue?
 
thanks
Kennetb