Is there any way at all to stop the MC303 recieving on certain midi channels.

i only need it to recieve on a couple but it recieves on all channels!!!!!!!!!

You have to send a sysex string to turn each channel on or off and change modes etc - inconvenient to say the least - in sound module mode to the 303. You can get these documents mc303adv.pdf & mc303sys.pdf from http://www.rolandgroove.com/support.html
which list the strings and other sysex midi implementation in a more readable format than the manual