Hello there.
I'm having the same problem with Tiscali in the UK. It will let me download sometimes then not at all, tells me I'm not connected when I am and that I'm behind a firewall which I've disabled. My mate's ISP is also Tiscali and he has no problems at all.......most annoying espcially when you pay good money for a anytime, no restriction ISP then it tells you what you can and can't do!!
Your irately,
Lesley.