Mbox Pro 3 No longer working Help! Please.

[Ru_]

Well I have been using the Mbox pro 3 on two computers and it has been working fine since i got it (not long after it came out) but since yesterday my two macs have stopped recognising it through firewire the audio is still coming up with level though as normal but i can't hear anything and the computers not recognising it. I'm kind of stuck here nothing has been changed which is whats baffling me. Has anyone heard of anything like this and are there any quick fix' also does anyone know how long the warranty is on avid products and what i'd do to get them to fix it if i can't resolve it.
Thank you for any help you can give.
Ru :)

[Talisker]

If your computers don't recognize the Mbox, how do you start PT then ? Or is it PT 9, in that case you're in the wrong neighbourhood