Connecting to arenanet

i posted this in another thread before i realzed this thread existed but i am having a problem connecting to arenanet. i have been playing the game fine since it was released untill a few days ago, when i start the game the box comes up saying connecting to arenanet but just stays at 0% and doesnt move i have tried system restore and even reinstalling my comp but nothing works. does anyone know what i can do? please help! thank you

You got a firewall? If yes, allow guild wars to connect to internet. Have you got a Router (Wireless connection)? If yes, Open ports 6112 and 80?