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