Sorry i am not the most IT literate but have seen these problems before. If not the java then can not help sorry but mine is working fine so would say its your end
Its not your firewall blocking it is it? Have you tried turning off your firewall etc and try again. I know when i was using Macafee then it stopped a lot of websites that requiored login
mcafee may still be blocking it but it is not the firewall. tried that with no luck. ran ad-aware and deframented just trying things, but it hasn't helped. if it is mcafee, what anti do you run now that does the job and let's you on site?