markus on EZdrummer1 on a Microsoft surface pro 3 - touch issue

Hello,

I just got me a Microsoft surface pro 3. I'm using EZdrummer1 in Reaper on it. It seems, while playing the drums with my fingers on the touchscreen, the sound is played when I release the "drum" not when I hit it. Is there a way to change this behaviour so that it is played when I hit the drum/screen?

Thank you in advance,

Markus