negotiating version

Using Dameware MRC 12.0.5 when I try to connect to an end point that is connected via VPN, I start a session, but it never gets past the negotiating version, then the connection is forcefully closed by the end point.  But when trying to connect to a device that is not connected via a VPN, but on the same LAN the connection establishes itself on both end.  Is there a connectivity option somewhere in Dameware that I need to select or disable?