Yamaha DTXpress/DTXplorer/DTXtreme

i just purchased dtxpress III from musiciansfriend and i have a 
little problem that annoys me alot (:P), after i reset to defaults my 
kick drum started loosing hits, like my pedal rebounded on it and 
made another trigger and lowered the volume of the first hit, is it a 
problem with the sensitivity? cause when i do that with a stick on 
other pads (2 hits on the pad, the first one hard and the second one 
weak) i get the same thing, what do i have to change?

also i NEED a setup for my toms, i dont seem to get nice sound out of 
my toms... anyone made a kit that sounds rocky to alternative? i like 
the toms that aren't very tight, anyone can suggest something? i have 
a concert in 5 days and i dont have tom sounds! plus i need a hihat 
that is more thrashy and noisy when its closed, any ideas PLEASE help 

Thanks in advance