Character not found?

Låter som att du kanske har port problem =/

4. Firewalls, routers, and internet connection sharing

If you are using any type of firewall, router, or you are sharing your internet connection between multiple computers, you may need to set your system up to allow access to the World of Warcraft game servers.

The firewall or router will need to allow unrestricted communication on TCP ports 1119, 4000, 6112, 6113, 6114 and 3724. You may find assistance in configuring your firewall and/or router in our Router and Firewall pages. Please note that these settings are suggested settings only. Blizzard Entertainment is unable to assist with the configuration of firewalls, routers, or network configurations.

If possible, try uninstalling any firewall applications on your computer, and physically removing the router from your internet connection (by having your computer connect directly to your modem). This will allow you to identify whether the firewall or router is responsible for the connection problem. If this turns out to be the case, please consult the documentation that came with that networking product, or contact the manufacturer for further assistance setting it up properly.

http://eu.blizzard.com/support/article.xml?locale=en_GB&artic...

kan ju alltid testa lite av dessa och se ifall de löser sig. Kolla också din brandvägg ifall den reagerar på något med wow, kan va så att den blockar wow när den försöker skicka informationen.

Reset router, Deleting WTF, Cache and Interface folders, och så var det någon som sa att testa göra en ny gubbe ^.^ men vet inte ifall de skulle funka XD men enligt honom så funkade det ^^

Edit: En till snubbe som har samma problem.
http://eu.battle.net/wow/en/forum/topic/1776388034

Gissar bara, men kan vara något i nätverkskortet i datorn som inte funkar riktigt ihop med ditt nya modem, prova uppdatera drivrutiner etc.
Annars kanske flytta frågan till internet/nätverks avdelningen, troligen bättre svar där.