I went to your site but I think I need a plug-in (Class).. I clicked on video and a window opened and then closed reeal quick. I did what you said, least i think, and I can play and record the refills in reason on the sequencer on the mpc. Only problem is that the beat i'm working on is coming from my headphones and the samples from reason are on my computer speakers. The mpc is recording the midi input and I can most likely save the project an play it later.. but the mpc an refills will be on seperate speakers. I'm posting this instead of looking further because I might have fixed my issue and the reason why i'm getting this situation is because i'm using headphones. I was expecting to hear all the sounds in my headphones though. I'm registered at the mpc forums and have used their search engine, which is either not that good or no one has posted anything concerning reason. I know at this point i'm a straight up newbie but your help is greatly appreciated, i come here as a last resource after searching.. some reason there is very very little on this subject on the net.
edit
I do not have the mpc's output going to my computer or mixer, i'm only using headphones right now.