OpenGL in GeForce 2Ultra, V_sync is not working

I have a Annihilator 2 ultra and when I run games like Qukae 3 or Alice the V_sync not work. I set the V_sync On By Default in my Video Properties and nothing changes, please help me.

Okay guys, it works now!

[This message has been edited by OCBkill (edited 04-15-2001).]