I haven't upgraded to 7.2 yet (currently 7.1) but there is no reason I'm aware of that it should not work. The really curious item is if you are already logged into a View desktop, you should have no network connection issues to the connection server. For it to then work normally on a physical desktop, make me think that there is a network/DNS piece to this puzzle.
To troubleshoot the issue though would require more understanding of your Horizon View network setup and also review the Connection Server logs. I would recommend reviewing the connection server configuration in the Horizon View Administrator to ensure the Blast Gateway has the proper hostname/port.