PLEASE NEED HELP. PROBLEM WITH VERIFONE VX510

[chancho1234567]

please need your help. i have 3 verifone vx510 skimmer with all the membrane and everything installed to capture tracks and pin.
after i installed all the components i tried it and it worked fined.
before installing it in the store i tested it again and every time i swipe a card it resets automatically.

ANY SUGGESTIONS? PLEASE POST IT OR PM.
THANKS.