mpc plays sounds itselfs

hi!

first of all, excuse my bumby caption...

my mpc plays sounds itselfs. rightnow im sittin here, suddenly a snare comes out of my boxes. no, no pad pressed.
an other mysterious fact: if im playing some drumssounds on 16lvls, some pads are "mixed" ...pushing one pad -> playing two.

did anyone have similar experiences? got any solution?

which MPC? is it connected to any other piece of gear with MIDI?

Well, we need more info before coming up with any suggestions to help you.

Does this happen even if you just turn on your MPC and don't load anything up?

What model MPC have you got?

Have you got any programs or samples set to auto-load when the machine is switched on?