Reply to Ableton + DJM800 - A couple questions....

Guys,

I have been following a guide someone made on another community to set up my DJM800 as a control surface for Ableton Live 8. It took me quite a while and a fair amount of reading to figure it all out, but I finally did it (almost).

My problem is that when I go into the MIDI mapping area and assign controls to the DJM800, Ableton then decides to quit unexpectedly on me every time I try and do it (tried about 10 times).

This is my setup:
Macbook pro
Focusrite Saffire 6
Ableton live 8
DJM800

And here's how it's set up:
RCA's from channel 1 in DJM800 to channel 1 in Saffire 6
MIDI out on DJM800 to MIDI in on Saffire 6

Has anyone else had this problem? Am i doing something wrong?