URGENT! Audio 10 not recognised!

Hey guys,
This is a very urgent post that I need help with ASAP as I'm a resident club DJ working 3nights a week - my next night is on Tuesday! This problem has led me to miss my gig last night - NYE!
I am running Traktor Scratch Pro 2 version 2.1.2 on a Macbook Pro OS X version 10.7.2 using the Audio 10 interface. My Traktor is only 4months old!
The equipment I use is 2 CDJ 1000s and a pioneer DJM 800 but I am guessing that is not the cause of the problem.
The problem I have is that the Audio 10 is not being recognised by Traktor or my macbook! I have the flashing USB light which is continuously on! I have tried restarting it a number of times - pulling out the power cables and ive tried 3 different USB cables.
Unfortunately I do not have any decks at home as I am travelling the USA so only use the club equipment so apart form when i'm at the club I have only been able to try the Audio 10 with no decks going in or out of it. I am guessing this wudnt matter tho as it shud still be recognised by my computer? If this is not the case please let me know!
I have totally uninstalled Traktor and re-installed. Reinstalled the Audio 10 driver and tried using the Device updater but i am unable to as the Audio 10 is still not recognised!
I have no idea why it is not working - I was using it all last week with no problems and I haven't dropped or damaged in anyway.
I cant stress how urgently I need to have this fixed as it is my livelihood!
Any help would be massively appreciated!
many thanks!

 

Have you installed 10.7.3?