Yamaha DTXpress/DTXplorer/DTXtreme

Hi folks,
I've been having a problem with hearing a cymbol sound when I hit my
toms that are attached to the same piece of pipe and the vibration
from hitting the tom is setting off the cymbol.  Has anyone done
anything to prevent this problem, like put tape on the pipe under the
cymbol clamp.  If I can't find a solution, I might have to just attach
the cymbols to cymbol stands instead of directly on the bar.  Any
ideas or thoughts would be appreciated.  At 46, I'm not quite as old
as some of you old timers, but I'm no kid either....lol.  OK, I guess
we are all still kids.

Steve