unable to connect to GW

for the past 90 minutes neither of the two Pc's I use to connect to the internet are able to connect to guild wars both can connect to the internet just not to arenanet. I've run the guild wars shortcut with the -diag added on to the end and everything completes but when viewing the results I saw this

=================================================
= Checking server connectivity
=================================================
Diag.ArenaNetworks.com - address lookup failed
File1.ArenaNetworks.com - address lookup failed
Auth1.ArenaNetworks.com - address lookup failed
Completed in 30.02 seconds


=================================================
= Tracing network paths
=================================================
icmp.arenanetworks.com - address lookup failed
Completed in 10.00 seconds

does anyone know what this means exactly and how to fix it ?

If its any help I'm running windows XP and I have a broadband Connection with o2 as my ISP.

If any more details are needed post here and I'll respond as soon as possible.

I looks like a DNS error (Domain Name Server) - a DNS takes the URL (xxx.com) you enter and "looks it up" in a list to convert it to a regular IP (xxx.xxx.xxx.xxx). If the DNS doesn't have the URL listed, or is down, or for whatever reason, can't find the URL, you can get an address lookup failure. It is most likely a problem at your ISP, but it could also be internal to ArenaNet. It will probably fix itself (or be fixed) soon.

Also, when you register a Domain Name with a Registrar, the Registrar sends a list of updated URLs to all the various DNS servers. If you change the IP connected to the URL, an updated list is also sent. It can take a while before the change filters through the system. It's possible that ArenaNet changed some of it's IPs and the changes haven't gotten to your ISP's DNS yet.