I HAVE A MICS 6.1, JUST INSTALLED W/PRI. ONE STA-232 WHEN YOU PROGRAM A INTERNAL AUTODIAL BUTTON ON THIS SET, THE AUTODIAL PART WORKS BUT THE OFF-HOOK INDICATION WILL NOT. HAVE TRIED REPROGRAMMING BUTTONS AND UNPLUGGING SET TO RESTART SET BUT SAME THING.ALL OTHER SETS WORK OK. WHAT AM I MISSING HERE?