I have a CS1000E running Rlse 5.50 and DECT. The DECT cards are split in slots 0-0-3, 0-0-4 of the Media Gateway and 0-0-7 of the expansion. We are having trouble with the DCS sets registered to DMC in slot 0-0-7. We are getting one way transmission between DCS sets and are unable to register sets to the card. The DMC has been replaced, but to no avail. Any ideas??