max/msp * Aduino+webcam=crash

Hi arduino

I am having problems using live video capture with my webcam (jit.dx.grab) and use arduino board at the same time... When I run the patch max crashes and I can't even end process in task manager. (PC user XP os)

could there be a com port conflict issue ? is there a way to assign com port to my webcam ? Any help or suggestion is appreciated.

Cheers, Mani