I've used WinDvr 3 software that came with my TV Box for a week no problem to record from my old VHS C and a newer Hi 8 camera. Now all of a sudden I get no audio and the audio selector in the WinDvr preferences is greyed out. I checked my drivers in device manager and all are working properly with no flags. WinDvr plays back the stuff I already recorded in WinDvr with the audio there no problem. What's up with that?