Thanks for the info but I have already looked at that one and it didn't provide any further info.  At first glance I thought outbound UDP was the culprit (not sure how or why as no outbound connections are blocked but it appeared to be that way) but further checking I realized that the PCoIP external gateway was still set as the internal IP address of the Security server rather than the external address.  I changed it and now instead of the black screen that says the connection ended I now get a black screen for a much longer period of time and finally a pop up saying the connection timed out.  So far I have not been able to find much on that particular error.......