Q-start depends on which channels are assigned to the crossfader, and the Normal/Reverse switch swaps the Q-start outputs.
For the Q-Start outputs Q-start left and Q-start right:
XF Left assigned sound turns off = Q-start left CUE/PAUSE
XF Left assigned sound turns on = Q-start left PLAY
XF Right assigned sound turns off = Q-start right CUE/PAUSE
XF Right assigned sound turns on = Q-start right PLAY
The key to making it work is make sure that the channels you want to work with Q-start are assigned to the crossfader.
Hope this helps.
Elliot