Connecting to ArenaNet 0%

When i start gw, the update window appears and tries to connect to ArenaNet.
It sais: "Connecting to Arenanet" with a 0% (down)loading bar bellow it.
It stays like that forever..

(Yes, i have connections to websites and all)
(I live in the Netherlands)

Is anet having problems again..? :S

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edit: solved, had to delete gw.dat and redownload everything

Do you have NOD32 as antivirus?

nope, i recently deleted it.

sounds like what our corporate firewall does, any firewall software that could be blocking it?

Try turning off Windows Firewall and see if it works.

I've turned off all firewalls i could find (windows firewall, firewall in the router).
But still can't connect to gw.
I've discovered that the desktop pc (wired) works just fine, but my laptop (wireless) can't connect..
edit: when i turn off my wireless connection and plug in a wire it still doesn't work, must be something on my pc.. o.O
any other suggestions?

SOLVED

when i move my old gw.dat to my desktop and force guildwars to download all the files again, it's able to connect to arenanet, but when i remove the new gw.dat and put the old one back it can't :O.
So the problem was somewhere in the 3 gig gw.dat that made my client unable to connect, this has to be the weirdest thing in guildwars i've ever seen..
(might have been because i installed exteel and plaync..?)

thanx for the help ev1