I just installed a brand new Kworld MPEG TV tuner card. Everthing works great for about 30 to 40 seconds and then the voume just kicks off. I can re-open the WinDVR software and the volume will work again for about 30 to 40 seconds. I can also hit mute and then turn the mute off and will work for about 30 t0 40 seconds. This has to be some simple setting that needs changed but i can't figure it out. I know that the volume works for an exact amount of time each time. Any suggestions???