After reading so many complaints about not being able to login, I noticed something: Virtually everyone who is having this problem is hitting the eq-toolbox.com domain, instead of the mapfiend.net domain. The cookies are set on mapfiend.net, since that is our official domain, and that is the source of the login problem.
I have redirected all other URL's to the mapfiend.net domain, so you shouldn't have any problems logging in now.