Reply to Timecode stops responding with TSP2 - Anyone had similar problems?

Wasn't sure if i've posted this in the right section :S but basically I've been having a bit of a problem with TSP2 when using timecode CDS (MK1) with CDJs at gigs and yeh hopefully someone can help?

My setup:
Macbook Pro 2.3 GHz Core i5
Audio 10
Traktor Scratch Pro 2.1.2

Problem:
Scratch deck randomly stops responding to the timecode CD, playhead will move but the waveform is stuck. It varies as to which deck 'freezes'.

I can't switch to internal playback either or between absolute and relative modes. I use relative mode and the icon will flash.

Forces me to use one of my other (internal) decks after which I can use the timecode deck again.

What I've tried so far:
Wiped out my macbook and reinstalled Traktor completely.
Tried different cables.
Burnt new timecode CDs.
Recalibrate the timecode.
Start the timecode track again.

Anyone experienced similar problems/able to help?? There doesn't seem to be a trigger but it happens once/twice at each gig.