What is the purpoe of connecting the mpc?? Strictly as controller pads? You won't be able to get any of the sounds from the mpc into reason. Gotta use pro tools or another audio editing program for that.
You can still sync up the MPC with Reason, play the sounds from the MPC and just use reason for extra sounds and rewire it to either cubase or protools to record the sounds from reason and mpc.