Newbie: Rim trigger problem PD-85

[Digiac]

Just bought a TD-9KX with additional CY-8 and PD-85 on Crash2 and Aux trigger.
All works fine except for the added PD-85.
When hitting the rim at low to medium (strike) level, I only hear the "head" sound. Only when hitting really hard, the "rim" is triggered.
Changing the RimShot Adj parameter helps a little bit, but when doing this, it creates a delay between hitting the head and hearing the head sound ?

I don't have this problem with the 3 "original" PD-85's.
All parameter settings are the same for all 4 PD-85.

When physically changing the "problem PD-85" with for example Tom 1, the problem goes with it. So now I have problem with Tom 1 (Tom 4 is ok now).

Is this a tension problem ? Distance between the rim and the trigger sensor to big ?
How hard should a mesh-pad be tensionned ?

I'm thinking of bringing this PD-85 back to the shop...

Digiac,
Newbie (e-)drummer.

[Michael Render]

It sounds like you have a bad pad. Take it back and get another.