I just got on the photo site at Makelure.com.
You do not use your screen name, you MUST use your email address. For example, if your screen name is fisherman, but your email you registered with is
paulbunnon@fish.com, entering your screen name won't work.
Enter your e-mail you signed up with, then the password that you use now with your screen name.
Let me know if this does not work for you.