Clients GUP status is still false

Dears,

I have a situation where I configured multiple GUP list by creating a rule that match by IP address and added in the list the IP addresses of the machines that should be acting as GUP in the subnet but after making sure that policy serial number is the latest on the machines when i open the client properties it says GUP "false".

Any idea what could be going wrong?

Thanks in Advance