I am trying to use Knoppix Live CD/DVD to retrieve files off my hard drive. However, when I boot up and get to the screen with the multi colored text I'm running into a problem. Its get through everything until it says

Looking for CD in: /dev/hdc

The console blinks for awhile and then seems to just stop. There is no apparent activity whatsoever. I've tried both the CD and DVD versions with the same thing. Any ideas?