The more I look at this, the more I am convinced that they have you blocked for some reason. The forum link is running the exact same version of vBulletin that this board is running, so maybe one of the admins or someone else who uses it can chime in and say if that is possible.
You can reach the site, given that the telnet connects and that the browser activities windows shows it is trying to load the first item, which is nothing more than a banner ad. The biggest clue is the lack of output from the get command in the telnet session. I think that any further troubleshooting would require information about your IP address, etc., which I am not willing to ask for, nor should you be ready to give it out.
I would suggest you call them, but I cannot find a published number on their site.
Sorry - I am baffled on this.