Clan application problem

I go to the Z8 Games homepage, I log in. I click the clan link. I click, clan list. I search for the clan I wanna join. I click on it.

Then I hit "APPLY" it asks me to log in even though I'm already logged in. So I try logging in. It blanks out the form, nothing happens.

I'm running a Windows XP Home, my browser is Firefox 3.5.