Problem connecting to Arenanet

Hey =)

Recently bought a copy of GW:Nightfall, but it fails to install everytime. At the 'Connecting to arenanet' screen (step 1 at install), it just stops at about 80%. Looked through the GW official help site and other GW related sites, and tried all the suggested courses of action to fix the problem, but still the same problem occurs each time. My router is set to allow ports 80 and 6112 for use, i've had my computer firewall and router firewall turned off aswell as my security programs, virus scanners etc off yet still nothing. The game WILL connect on the other 2 computers in the network, but not for this one. Had no answer form the guildwars tech team, so any help would be greatly appreicated, im just itching to resume playing the game (played it for 2-3 months on first release) to play with my IRL mates.

Using the belkin Wireless G Plus Router --> http://catalog.belkin.com/IWCatProdu...duct_Id=179477

My isp is telewest broadband if that helps

system spec:
Microsoft windows XP professional version 2002 service pack 2

intel pentium 4 CPU 3.00 GHz
2.00 GB RAM
NVIDIA Geforce 4 6600
D-Link airplus DWL-520 Wireless pci adapter

Just hoping someone has had a similar problems, because im stumped and so my GW's playing friends.

Much appreciation in advance! =)

PS. This machine > other 2 on network, they are pritty ancient compared to this one.

Add the -diag switch to the end of your GW shortcut and see what results that test outputs.

EDIT: Just noticed you're with Telewest, they haven't implemented any 'ellacoya' style packet inspection have they, or any other network limitations?

make sure your fire wall or virus protection is not stoping it