Yamaha DTXpress/DTXplorer/DTXtreme

Hi everyone

Ive recorded some patterns into sonar, but I cant work out why it 
wont play back through the DTX.

I have all the midi bits set to "ON" or PC ( Its connected to my P.C. 
via a 4x4 Midisport)

Are there some hidden settings to receive data into the DTX?

If there are already answers to this on the board can some kind 
person point me to them.

Thanks for your time.

jazzcat