TMG Firewall Service "Active Sessions" monitoring not working

Hi,

We are using Orion SolarWinds product for network monitoring and though configuration seems to be all OK due to some reason we are unable to see Firewall Service "Active Sessions"  for Microsoft Forefront Threat Management Gateway 2010 monitoring.

I have checked on the TMG server and information is visible in the TMG performance monitor.

Please suggest.

Thanks & Regards,

Kumar