nvoglnt.dll error

hi i im trying to play counter-strike on my new computer and after awhile of actual gameplay it freezes and the sound loops. i then get an xp error message saying ’ sorry we had to close counterstrike…’
in the error report it included that the ‘nvoglnt.dll’ had caused the crash.
im running windows xp and have a GeForce 4 Ti 4200 please if you can help me post!