FAQ » vertical sync stops after 5seconds

vertical sync menu is unavailable
the fps starts at 60 , then 5seconds later fps are at 60-100fpss , the lags are awful :(
reinstalled amd drivers (hd5850) and neXt but no succes . i dont know what happened . the same thing happened before 2 month ago and i solved the problem by reinstalling window..
i just cant play on my tv like before, i have to plug my old small 120hz lcd and fps are locked a 120.
-_-

hi, sorry i was a little mad about this the other night :p , i tried the vertical sync menu in radeon general setting , and i tried with a next profile too, but i still cant lock fps to 60. vertical sync menu in next is locked
http://img15.hostingpics.net/pics/777587Sanstitre1.jpg
i can play on my other monitor this is not that bad, but this issue is vicious :p , no problems then sync fail after a month o_0 , two times in a row
sometimes i solved the problem when new radeon driver came out , or next update , but its like problem always comeback
i had the same issue sometimes with the lcd 120hz when i switch monitors after some tests (when fps starts at 60 instead of 120 on 120hz) , but i solved the problem everytime by rebooting pc.
and with the lcd 120hz next is alway perfect sync at 120
tks for your help

please how can i activate the vertical sync menu in next ?