I have some trouble with the Sigma Hollywood Plus card. After I installed everything including the drivers and software that came with the packet CD. The DVD video disc just wont play. The software is REALmagic Hollywood Plus and it does only work with music CDs but not DVD video or even VCD? Why is that? When I tried to play the disc nothing would appear on the screen and there is no sound. I have done everything from going though the manual to reformat my harddrive and downloaded new drivers but nothing works please help!