Thanks for the help, topdog. I can't get past the firewall, though. Not sure what it's doing...and since I don't control it, not much I can do.
Would it make more sense to run the cron job on the final destination machine and then ssh into my server...and then scp the files back to the final destination? I can get from the final machine to my server through that firewall...just not to the ftp site to download the mp3s.