Return of Reckoning

Hitting enter with the cursor in the pswd box will launch the game, but I get no video with an intro audio track and then this:

Disconnected from server. Error: System.Net.Sockets.SocketException (0x80004005): An established connection was aborted by the software in your host machine
at System.Net ...

Getting the grayed out 'connect' too. I've tried everything I've seen mentioned here with no success.