judging from your other "help me" post, you're probably not going to answer the questions or make any attempts to follow some of the other advice besides reinstall or open the firewall but...
where exactly are you installing it to on your computer?
have you run a ping plot to any of the ah servers yet?
are you running on a wired or wireless connection?
are you using cable, dsl, satellite or dial up for a connection?
if you're using cable or dsl have you tried connecting your computer up directly to the modem?