If you use Windows XP Sp2, then make sure you have the PCTV Stereo sp2 patch. Moreover, change the Pci slot if you have a free pci-slot on the motherboard to overcome the conflict between IRQs resources.
The sp2 patch should mostly solve your problem, google or search the forums for the same. The ftp site of pinnaclesys.com no longer has the same. So bad luck with it.
For all problems with Pinnacle cards, you can add 'ptsci ' - in your yahoo messengers and contact the customer support online.