I installed silverstripe with MAMP on my own computer and have had no problems. But I am having problems with the login and passwords with my installation on iis6. Everytime I want to login I need to reset my password. Once I login it takes me to a blank screen. I have to manually redirect the page to the admin page. The admin page works, but it is frustrating to reset my password everytime I login. This site that will have multiple users, which will not go over well at all. I need a solution to this a.s.a.p or will have to come up with others solutions. I have tried the Security::setDefaultAdmin($username, $password) in the _config file , but this isn't recognized at all. I am not sure what to do. I really need help. Any suggestions?

ps. I have tried a fresh install and transferring my MAMP installation, both are having the same problems.

Thanks!