GRFS - Coop campaign problem

Hello,
The game Ghost Recon: Future Soldier writes - fail to join friend Unable to Establish Connection to host

firewall - offline
C:\Windows\System32\drivers\etc. - hosts deleted
router ports - ready

http://ubisoft.custhelp.com/app/answ...ail/a_id/16662

OS - Windows 8 x64

thank you for support