TMG Reporting Failure

Hi,

I have an array TMG setup with my first TMG server as the reporting server. When I run a report from the EMS server for a specific user and date I get the following error.

ForeFront TMG Error|
The Operation Failed
The Microsoft Forefront TMG Control service could not be accessed.

The error occurred on object 'Reports' of class 'Reports Configuration' in the scope of array 'TMG Array'.

Any ideas why I would be getting this? If I run a normal One time report it all works fine.