Make sure the peak base volume is set all the way down and the peak and peak decay amount is all the way up. Also make sure you're linking the channel to the controller in just peak, not LFO or Peak and LFO, just peak. Also, make sure the channel under the peak controller's volume envelope is properly set!
tsk tsk tsk, you were using a snare as a gate. make sure you use things that can hold a note!