I HAVE AN OLDER MICS RUNNING 4.1 I BELIEVE. WE ARE TRYING TO ADD A SECOND PRI TO THE SYSTEM BUT THE CARD JUST FLASHES LIKE IT IS NOT SYNCING I SWAPPED THE CARDS THINKING ONE MIGHT HAVE BEEN BAD..BUT IT WORKS. I HAVE ALREADY TURNED UP THE SERVICE SO I KNOW IT IS NOT A CROSS CONNECT OR PROVIDER ISSUE. ANY IDEAS?