When my XP-30 is midi connected to my computer, the little "midi in" light is always blinking, and together with the blink comes this sound:
http://www.hib.no/ansatte/jla/clickclickclick!!s.mp3

it's very quiet, and easy to get rid off with the noise reduction in Cool Edit, but very annoying when I sit with a headset and hear "click click click click" in my ears.

Does anyone know what is going on?

Jørn
http://www.mp3.com/gamemusic