do the following
Make sure Punkbuster is running properly
1. Click on Start.
2. Click on Run.
3. Type services.msc and click OK.
4. Verify that PnkBstrA and PnkBstrB appear.
* If these services appear but do not say 'Started' next to them, right-click on the first one and select Properties.
* Under the Startup type pulldown, select Automatic.
* Press the Start button just below the pulldown.
* Repeat this for the other service if necessary.