Im using WinGate 4.5.1 on winXP sp1 and its working good, but when i change to sp2 i got blue screen saying something about qbikhkXP.sys.
How to fix that?
WinGate 4.5.1 is very old now. I'd recommend upgrading to 6.2.0. You can still use your licence key, so you get the bug-fixes and some new features (but not all new ones) for free.