whenever i try to go to the page to redeem my bonus code it tell me to login i do but then i go back to the page it still wants me to login

Go to the main page and log-out. Hit F5 and and login again. Now try to do it. That might help.

Same for me. even when I try when I am logged in it leads me to my main page...

theres been a glitch for ages.
you need to do what ComedyinK said. once youve logged out it might be worth deleting your temp files and cookies.

Did that 10x; doesn't help.