Fast Track C400 not recognised in sound preferences, Mac

[Rory Alexander]

Hi all, I'm new here
i just bought a fast track c400 and it seemed to be working fine when i first connected it, but once i disconnected and reconnected it, it failed to show up in the sound tab of my system preferences, and i can't use it for anything.
I then restarted my computer and it worked fine again, but this means that every time i want to reconnect the device i have to restart my computer, which is annoying to say the least, since its a macbook and i use it for everything. Im fairly sure i have all the latest software/drivers necessary.

i am running:
Macbook early 2009, OSX lion installed, 10.7.4
Protools SE 8.05 (came with the fast track)

I've tried searching for an answer but i can't seem to find one, If anyone else has encountered this problem or has any suggestions it would be greatly appreciated. thanks