IT-Analytics doesn't open dashboards & reports

Hi,

I am running SMP 7.5 latest version and IT-Analytics. I have an issue with starting dashboards & reports. Cubes are working fine.

When I want to open a dashboard on the right site I only see a white page and after a long time a message "Internal error - server connection failed". I know that the reportserver is working correctly, because from the same server and same username I can open the reportserver directly and seethe dashboards and reports without any problem. It looks like that the report builder isn't opening within the browser.

Any suggestions are welcome?

Ben