iexplorer 6 login problem.

I have a domain that is sending the user to my page by a frame and ie6 users have problems to login because of the third part cookie.

So.. I read that if you are editing config.php and the lines $cookie_domain = ''"; and $cookie_path = '/'; it?s a chance that you can get it work.

Is there anybody with my types of problems who have it got to work?
Then can you publish your config.php