If your browser hangs when trying this site there is the possibility that your IP address is either on a black-list or on a route table that the forum server does not like and won't respond to. You need to get a new IP.
First go to
www.whatismyip.com and write down your IP address (for reference only.)
For most folks with DSL and cable, shut down the computer and then then turn off the modem (unplug it if it has no switch) for at least 2 minutes. (You can leave router on if you have one.) Then turn on modem and wait for lights to stop blinking. Then power up your computer. Go to above web site and see if you have a new IP. Then try the forum and see if it connects.
If not... and you have a router, do the above but turn off the router, and leave everything off for 30 minutes and then bring up the modem, the router, and then the computer (in that order).
I had a problem today where the forum just would not connect. Don't know why, but I did some research and my best guess is that the ISP is blocking some of ATT's IP addresses. This sometimes happens when a few computers in a range of IPs are pumping out spam. The ISP will block a whole range of them to 'turn off' the flood, as it were.
HTH.
Al