I JUST GOT A TASCAM TSR-8 AND IT WAS WORKING FINE THE FIRST DAY. IT WILL REWIND AND FAST FORWARD JUST FINE BUT WHEN I GO TO ENGAGE RECORD AND PLAY THE TAPE WILL NOT ROLL. THE MOTORS SEEM STRONG AND I AM PRETTY SURE I HAVE IT THREADED CORRECTLY. PLEASE HELP IF YOU CAN.