Problem.. Some help please? :]

[Akios]

I've searched and read the FAQ, my problem wasn't there.

I've made a new account and I'm trying to update it to Gold. My problem, is that the website won't log me in.

I type in my account, my password, and the message comes saying "Thank you, for logging in" and then it goes back to the page i was viewing before, but I'm still logged out. I've tried it on 3 different computers so I know it's no my computer. And this problem has never happend to me before. Any suggestions as to how I can fix this?