renoise with Roland mc-505

Hi!
How can i get renoise to work with my roland MC-505 ?
Renoise finds the 505 and I can record music into renoise, but when I push play, no music appears….
My arrangement is MC-505 via midi output, into PC-300 controller-keyboard input and from keyboard till computer via USB.
Hope you understand me.
Please help :)
\Kaspar Dan
Denmark

Suggestion: You could use your MC505 to control the functions in renoise with the knobs on your 505 (Midimapper). I think it’s also possible to control simple functions like play stop etc (I’ve never tested it with my RM1x, though)…