Yamaha DTXpress/DTXplorer/DTXtreme

I am using a pair of Roland CY-6 cymbals with my Yamaha DTXpress 
module. They are dual-trigger, chokable. For some reason though, 
when I strike the playable part of the Roland cymbal, I get either a 
very low sound or none at all the closer to the rim I play. If I hit 
the hard plastic (unplayable side of the cymbal near the back), I 
get the correct sound. is there a way to reverse this so that the 
module recognizes the front of the cymbal as the main trigger? 
I would also like to thank however it was that answered me on my 
previous question with regards to the roland fd-7 pedal. Would you 
happen to know what adapter exactly it would be that I should get? 
Thanks (I'm new at all of this - i haven't even actually started 
playing yet; I've had some trouble getting things going as you can 
see) Thanks again!