hey guys, first time poster but i have been using this forum for help for a long time. anyways, i have my macbook with garageband and i recently bought a Yamaha DTXplorer Electronic drum kit. i have the midi-usb cable to attach with. the problem is once im using the kit with garageband, some of it works some of it doesnt. the bass drum is the snare and the hi-hat doesnt correspond with the hi-hat pedal, they both just make seperate noises. Does anyone know how to set this up to work properly? thanks guys!