I can't login to my Fangamer account on Starmen.net, can somebody help me, or has the same problem?

I’m trying to upload some new Mother/Earthbound fan art to the Fan Forum. My computer automatically remembers and puts my name and password, and I click Login. It won’t let me in, it just stays on the same page. This didn’t happen before, I was able to login just fine, until yesterday and today. I don’t know what’s causing this problem, or why it’s happening. Please help me, anyone?