Login to wp-admin is not working and no error message is displayed

I am having trouble logging into my newly created wordpress MU site. If I go to http://peaksoverpoverty.org/wp-admin and enter the correct credentials, it reloads the login form page and displays no error message. If I enter the wrong credentials it reloads the login form page and tells me the password is incorrect and that my cookies are not enabled. I am guessing the cookies not enabled is the problem with logging in, however I definitely have cookies enabled. Any idea how to fix this?