joining game Black Hawk down

[bobo]

when me or my friend try to join each other in a game of black hawk down it just locks up game we both are on windows xp both have routers and put in port number for bhd as 17479 tcp and udp cant understand why this happens is there a fix for this we both updated game using the game updater to v 1.5.0.5 the part where it locks is when its loading servers it gets to about 82% then nothing happens and when you click the back button it locks up