[LAU] Freebob problem with M-Audio Firewire Solo breakout box

Hi, I apologize for cross-posting, as I've already sent this to the Ubuntu Studio list, but I don't think the problem is specific to Ubuntu... I need some help getting Freebob to work with my new M-Audio Firewire Solo device instead of a soundcard. When I run gscanbus, the Firewire Solo is recognised, but when I do $ aplay -l I get the message: aplay: device_list:204: no soundcards found... However I know that the Jack server can 'see' the Firewire Solo in some way because if I do $ jackd -d freebob without the Solo plugged in, Jack won't start. But if the Solo is plugged in Jack will start, and I get the messages: JACK compiled with System V SHM support. loading driver .. SSE2 detected Freebob using Firewire port 0, node -1 libiec61883 warning: Established connection on channel 0. You may need to manually set the channel on the receiving node. libiec61883 warning: Established connection on channel 1. You may need to manually set the channel on the receiving node. But still I don't get any sound. I have no idea what 'manually set the channel on the receiving node' means. Also, I don't know if this is meaningful in any way, but when I open qjackctl and go to setup, the 'input device', 'output device', 'input channels', and 'output channels' drop-down boxes are greyed out. I've read all the info I could find on this from Google searches (though a lot of it is way over my head) and I'm running out of things to try to make this work, does anyone have any ideas? Thanks, -Katie.