rec command

I was able to record from a cassette tape player to the aux in on my soundblaster card to a .wav file. I was using the gmix mixer to allow the sound into my computer then I was using the rec command in a terminal window to actually perform the recording. I was doing this from SuSE 7.3. I upgraded to 8.0 and can no longer record as the command just times out and returns to the prompt. I test the file created and there is no sound. Usually these recordings are 30 to 45 minutes long and I have to hit <ctrl> C to stop recording. What happened here? How can I correct the problem? Is the rec command no longer any good in this version or do I need to download another more recent copy of it? George Johnson