muscle sensor v3 gives 0

Hi, i have problem with muscle sensor v3 from sparkfun. I wired everything due to manual, but everything what i get is 0. It gives 0 all the time. What can be wrong? Every one, who has problem with this muscle sensor says that he gets rumble around 330, but to me it gives 0. Thank for reply.

Where is your code?

Difficult to find problems if not supplied.