aha! so you're just wanting to login to the website to create a tournament.
i'll assume you're using ie? goto internet options|security and add
http://www.lspn.net to the trusted sites. you'll have to uncheck 'require server verification (https:) for all sites in this zone'.
goto internet options|privacy|sites and choose to always allow cookies for
http://www.lspn.net.
edit: i did neither because 1) i don't use ie, 2) i opted to allow private header information to be passed via zonealarm.