KH pro not playing back after sync lyricks

[Pastorterry]

I am back again I thought that I had the problem undercontrol but when I came back to work on another song it does the same thing that is it will not play in the Karaoke mode when playing back after the lyricks are sync'd with the music file.
The only progran I have added to my computer is Tax cut. I know that the problem has to do with something on my computer but I cant seem to find it. I have tried all the settings in the vidieo . The res is set to 1024 x 768 , color quality is set to 32 bit.
I have checked and there are no conflicts in the device manager. Do you have any Ideas. The last time I posted it seemed that you were suggesting mabe a vidieo issue. I have Nvidia TNT 64 pro