Change the "Tool Change" section in your POST.
Mine looks like this (I have an 1100 with the Tormach ATC). Not pretty, but it works more or less (you'll need to edit the startup code to match as well):
You can leave the M01's in and switch them off if you want.
3. Tool change
comment_start,"NEXT CUT - NEXT TOOL"comment_end
n,rapid_move,"G53 Z-2",coolant_off, spindle_off