Problem with pad`s , PLEASE HELP!!!

Hi, i have problem with my pad`s. When i`m pushin pad1 i hear sound from pad06 and pad01, and when im pushin pad6 i hear sound from pad 06 and 01, What could it be? Do i need to change my pads or something else inside?
It`s the same problem when im on Track mute section and its only pad 06 and pad01. I was tried to change the pad in places but it doesn`t help. i have MPC1000 blue with old pads. Please help me.
p.s. sorry for my english:)

Does this problem occur in every project?
Maybe check SimultPad options.

yes it happened it every project, but now it`s mirracle!! when im write previous post i try to check the mpc and MPC self repaired!! sometimes it`s like that but i`m afraid that it could eventually go wrong in the longer

It`s happen again, i took out the ram and it`s still the same problem, what could it be? i changed a os from jj os 3.09 to 3.12 and it doesnt work

I had similar problem. But it was for a moment. Try to loose screws in casing(i mean those in front, above cf reader, cd and in the middle)

Still nothing, i took off the case from down and the both plastic panels and it`s still the same problem ;/ loose screws inside and it doesnt work

Go to program mode and see if the pads are set to the same midi channel.

That would cause this problem.

i was try with ram and without ram and all midi off, i think now problem was resolved , all depend on humidity of air and temperature inside my mpc , when i moved mpc to other warmer room, problem disapear. When mpc is turned on longer then 30 minutes, it heats up inside and work like before
This may seem impossible but I think it was that