Me, and from what I'm seeing quite a few other people, are having a very simulair problem. I Highly doubt this is on Taisukai's end. I put in a ticket and I got the usual answer about it most likely being MY firewall, MY OS, MY DirectX version. Basically my entire computer is causing this issue. When looking at other people experiencing this problem, it's clear to see that it's at the fault of DWO's login server, or account administration. Just because there are people that are able to log in, doesn't in turn mean that a handfull of people who are experiencing the exact same problem are at fault.
I really hope that Aeria Games look into what is actually causing this.