I just got back into drumming after a 30 year hiatus. Bought a DTX 400K kit because I was just going to dabble. Naturally, I upgraded as much as I could once I got hooked (cost more than if I had just bought the higher module). I bought a DTX 502 module since I want to eventually upgrade to chokable 3-zone cymbals, a real high hat stand and the DTX pads (all the stuff I convinced myself I didn't need when I bought the first kit<sigh>). Now I can't get two of my three cymbals to make any sound at all. I have one PY90 hooked up to the aux port on my KP65 tower but all it does is make the kick sound when struck (on the 400K it I could assign any voice to it). The second crash , which is a mono pad, has only mini-plugs and in order to hook it up to the new module , which is all 1/4" , I need to use a y-splitter adapter that has two female miniplugs to a single male mini plug which I then plug into a mini-1/4" adapter (I know). I'm convinced that the extra adapter is the problem. The stereo input for the toms will work with a Y-adapter according to Yamaha but it must be a two mono-single stereo adapter. The guys at the source look at me like I'm from Mars and the local music shop doesn't follow either. Any suggestions? Must I absolutely use a Y-adapter of two mini-plugs to a single 1/4" jack? Help (apologies for the long winded question).