Having problems with a Tevion VS-USB2800D DVD maker. The installation apparently went fine. My USB host controllers are up to date. I have installed the device on a USB 2.0 port. I have installed PVR but the screen remains blank. The VCR is connected via a scart lead (at one end) and a red white and yellow cable at (the other end). I have not connected the S-video lead. My PC is an intel pentium 4 (2.6 Ghz) with 512 of RAM. What am I doing wrong?