Yamaha DTXpress/DTXplorer/DTXtreme

Hi..long time drummer, somewhat longtime DTX owner (bout 3 years). 
Recentley my 3-zone snare has stopped triggering everything but the
main trigger sound..not sure why.  Would this be a trigger malfunction
or a setting?  The main trigger sound works perfect everytime.  Also
when I plug a cable (stereo cable) into the jac I can hear the other
sounds...but not when I play :(  Both of the other triggers stopped
working at the same time.

I would appreciate anyones help :)

-Blake