Have you gone into the sample manager and listened to your results there, and heard the dead air there as well?
Also, a bit more basic troubleshooting:
RAM-R: Does your trig have any p-locks on it? Do you have more than one trig on the Rec track? Are any LFOs or track mute pairings affecting it?
RAM-P: are Start and End 0 and 127, respectively? Are DEC and HOLD at their max amounts? LFOs/mute pairings here?