Windows 7 can't login to wireless connection

[happyft]

I just put Windows 7 on my HP dv6707us notebook last night. And everything worked fine with the installation and everything...until I tried getting on the internet. The network here is through wireless. You have to open up the browser and then a login page pops up and you login. I get the login page, but whenever I try to put in my login stuff, it comes back 'Authentication Failed' The taskbar icon says that i'm connected and being able to see the login page generally means that i have connectivity. I have tried other people's login information, just to check if my subscription had expired. And nobody else's worked. I've updated drivers with the drivers off the the HP website. And I don't know what else to do.