Talk me thru this please?

Ok, midi is not my thing, I have a Roland XP80 connected via midi to my VS100, I can play all the synth sounds form Sonar and all that jazz, but I cant seem to get drum sounds working ? I just want to press the keys on the XP and get drum kits or program drums in sequencer style, I have the keboard set to midi ch. 10.
 
Thanks,
 
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