ive got problems with hd2 and Win 2012 R2 Maschine 64bit.
Problem is that when i create server (with exec, Server launcher or Server Manager 2.9...what ever) the console after "Game running" close itself.
I allready had Disabled IPv6, HD2DS exe run in XP mode and as admin.
I had same problem with Win7 and had to go back to WinXP for my server, but i guess its firewall related because in my case, when i started server on ports that was'nt opened in firewall(in computer not in router) then no problems, but when i opened these ports, then hd2ds console closed itself after loading a mission.