I am trying to use my kaoss pad 3 and ableton 8 and have become stuck

I have got it setup using a komplete 6 audio interface and can hear fx from the pad all ok affecting the played sample.
The problem is when I try to record the fx it does not record at all.
This is how I want it to work:
audio sample played via ableton > kaoss pad fx > back into ableton so I can record the track.
I am now tearing my hair out

any ideas?
thanks