How to prevent Windows 7 Remote Desktop time outs?

I can't seem to get some Windows 7 machines to prevent active but idle Remote Desktop connections from timing out.

I've changed all of the local group policy settings on my test machine under

Computer Configuration
 Admin Templates
  Windows Components
   Remote Desktop Session Host
    Session Time Limits

To disabled and I still get time outs of active but idle sessions.

Is there any where else I need to make changes?

Push Start > then type "Local Security Policy"

Inside the Local Secuirty Policy Snap in

Security settings > Security Options > Microsoft Network Server: Amount of idle time required before suspending session

Default is 15 minutes.

I need to modify your statement.. I had the same issue on a PC in my facility, and the path was: "Security settings > Local Policies > Security Options > Microsoft Network Server: Amount of idle time required before suspending session".

I had to hunt for a bit, using your reference. Though very good information, was not 100%. This should correct it.