Invisible Wolves

[jujitsuhoney]

I have no idea why but most of the time that im in-game i can't see any of the wolves. I keep getting attacked by Angry Wolves i can't see and ending up back at Rumen again and again.
I'm using my laptop and its specs are: 1gb RAM, On-Board Graphics Card, Windows XP, 1.6 GHZ processor.
Can anyone help?