Problems with CMM GPS Sync

We have a CMMmicro that when we have the Master GPS Sync Pulse turned on then we start to lose access to the APs and the CMM. For example if I reboot any of the APs or the CMM, chances are I will lose access to one or all of them. When they come back up they will allow me to ping once and then disappear(this is what happens 9 times out of 10). However, as soon as I turn off the GPS sync pulse I have no problems accessing either the CMM or the APs. Of course in this configuration I am forced to have one of the APs generate the sync pulse itself. Please let me know if you have any ideas.

Do u have the 2.1.3 firmware on the CMM ??

Yes currently on the 2.1.3 version of the firmware, though the same problem manifests itself on older versions of the software. We were originally of on version 2.0.8 and the same problem manifested itself there.