Don't know why you ask me...but I'll try to help (resigning my tasks here as of next weekend).
The only things I can think of are the following:
Your DNS settings are incorrect
You are using a firewall that blocks cookies or this url
Web page unavailable can now and then occur when the deamon is resetting here, which happens every hour, but only takes 1 second), but this seems another problem.
I think this has to do with your connection rather than any setting on this forum (when settings on this forum are incorrect in your profile it will show by the fact that you have to login before every post and has to do with cookies).
If you are using dial up, try a different provider.
That is all I can ssay about this, sorry