PS/2 Mouse wont wake pc from C3 sleep

[PILLAGER]

I just got a new mouse but its a PS/2 connection instead of USB and it wont wake the PC from C3 sleep (i think the mouse is being turned off in sleep).
My old USB mouse which i took out today worked perfect and would wake the PC from sleep by clicking once.

Under Control Panel>Mouse>Hardware>Properties>Power Management:

Allow the computer to turn off this device to save power is unticked and greyed out
Allow this device to wake the computer is ticked

Im using Windows 7 x64 Ultimate.

I had this issue before but it was months ago and i found out how to do it from a thread on the internet but now i cant find it, so any help will be appreciated.

 

[PILLAGER]

both the keyboard and mouse are PS/2
both have
(Allow the computer to turn off this device to save power) unticked and greyed out
and
(Allow this device to wake the computer) ticked
yet both power down in sleep mode, i dont get it!