assumin u usin Win XP and have SP2 installed
dl dis and c if it solves ur problem (u mite wan 2 change d value of d registry keys back 2 d old 1s)
Update for Windows XP (KB894391)
Update for Windows XP (KB927891)
if it still fails 2 resolve ur problem den u mite wan 2 run
WinSock XP Fix