I Use WIndows 7 for the latest games but Windows XP X64 remains my favourite OS for everything else

I have to report a problem with EVGA PrecisionX which I do not understand and that is FRAME RATE TARGET does not work !, I have basically destroyed my XP64 install trying to fix it as it makes no sense to me why it does not work, let me explain why... that is, MAX FRAME RATE LIMIT, does function, to my thinking this is the essentially same thing ?
I even tried with a normal 32bit WinXP just to test and guess what, Only the Max frame rate limit also works !
I can not believe with 3 releases of EVGA PrecisionX this major bug has not been picked up.
I assume Unwinder compiled this program for EVGA, I don't know if he monitors these forums or if anyone else has any answers ? But I would appreciate some information on this issue, Cheers