Yamaha DTXpress/DTXplorer/DTXtreme

Once more, thanks for your assistance yesterday.  I'm getting the 
system the way I want it. :)

I am having an issue with the new Pintech Hi-hat.  I was able to 
increase the volume and gain to get a decent sound out of it without 
having to strike it hard.  However, I'm noticing now that when I try 
to come up on the Hi-hat peddle to sizzle the hi-hat while 
simultaneously hitting the bass drum, I'm getting zero sound.  At 
least I'm not getting the open hi-hat sizzle.  If I just hit the hi-
hat with the peddle undepressed and nothing else, I will get the 
open hi-hat sound.  But as soon as I syncronize a bass drum strike 
with the open hi-hat - I get zero response.  It seems like it's 
getting cancelled a different sound.

Could one of the changes I made to the Pintech head have caused this 
occurance?  Any thoughts on a possible remedy?