Ableton 6 failing to recognise my M-Audio Fast Track USB

[massivenoob]

I managed to record things once or twice from my keyboard.

However, in Ableton 6, in preferences, when I set the audio input device to "Line (Fast Track) DX" or "Line (Fast Track) Wave" (whats the difference???),,,it says "Failed to open the audio input device"...

Its frustrating because I know I've recorded before, and now its not working anymore!

I have an Acer laptop, 2.5 Ghz of memory, two hard drives of 40GB each. 1.86Ghz speed.

My keyboard connects to my audio interface through a black cable. Another black cable goes from there to my large speakers. A USB cable connects my interface to the computer.

I would really appreciate any help that you could provide!

[Cailyn]

DX refers to DirectX drivers, WAV refers to MME drivers. I am not sure what your problem is but I would suggest you make sure all your drivers for the interface are installed correctly. Also, do you have the option of using ASIO drivers (which generally work better and faster)?