Problem loging in with mobile phone.

Hey, i am having some problem at loging in, in ma mobile phone.

When i go to the log in page, after i click login, then i'm geting redirected to a blue page, with the login, then i imput, ma pass and nickname and click login, then the loading bar appears, but instead of loging me, it sends me to the same blue page again...

Short story: Can't log in, in ma cell phone...