why redirect is not work with IE

[eluser]frrose[/eluser]
let me explain for you
i have login form
i made code if you inserted the correct username and pass it will redirect you to another page

if not it will go to another page and ask you to try again


on IE the redirect is not work

that is mean
if i insert the correct username and password it will redirect me to the login form again (this same page)

it is my problem and you can try it here :

http://www.artway.me/image/index.php/admin

try with
email : test
pass : test

thank you