trouble using m-box 2 with ableton

[djcalg]

hi guys i am having a bit of trouble using my m-box2 with ableton 8, during a session there are a countless number of times where the cpu meter in the corner of ableton jumps right up to over 150% for a small ammount of time which results in the sound stalling and then catching back up on its self.

i have my m-box plugged in directly to my computer, si thnk it may be something to do with my audio drivers, as when pro-tols was installing it said that the audio drivers never installed correctly, can anyone tell me if this is the problem iand do they know where i wld get the audio drivers from without reinstalling pro-tools 8.1 update again.

thanks

cal