imput guitar sound

New

WHEN PLAYING THE GUITAR IT GENERATES THE SOUND OF THE CHORD... BUT THIS SOUND IS SUDDENLY LOST AND SILENCES. I HAVE TRIED TO MODIFY SOME GUITAR EFFECT PARAMETER, IN SET UP I HAVE TRIED TO MODIFY SOMETHING AND I DO NOT GET RESULTS. ALSO, MY ACOUSTIC GUITAR HAS A FISHMAN BRAND PICKUP ATTACHED NEAR THE NECK, I HAVE CONNECTED THE GUITAR DIRECTLY TO THE FENDER TWIN BRAND AMP AND IT SOUNDS GOOD WITHOUT ANY PROBLEMS. PLEASE I NEED TO KNOW WHAT IS HAPPENING, I HAVE READ THE MANUAL COMPLETELY AND I CAN'T FIND THIS POSSIBLE CAUSE OF THE PROBLEM. TO FINALIZE, I BOUGHT THIS PEDAL VIA THOMMAN.COM AND IT ARRIVED AT MY HOUSE IN MEXICO WITHOUT ANY PACKING OR HAMMER PROBLEMS.
THANK YOU