Realtime reporting not working anymore

I have à problem That the 'open livelog' is not working at all for all modules.
Restarting the box doesn't solve this.
For example when I want to view the VPN live log but the window keeps blank.

Tried To view it from ie and safari browser.
Any help is appreciated.

The problem is even stranger,
When I go to logging and reporting ,and select view log files, all log files are 0bytes.

Regards

Eddy Mulder