I checked their web site and there appear to be 2 models. 27387 and 27388. They look to be identical except that 27388 ships with extra cables and the DVD version of Cyberlink software. However, only 27388 documents support for karaoke titles. Which model did you get?
Note:
http://www.cablestogo.com/ appears to be the same company, but with a more accessable web site.