I got a reply from DoDMERB.
I sent an e-mail before asking for my username, and received it, but apparently I had that right and the problem was with the password. Could you send me my password, or let me reset it? Thank you!"
"I will reset it for you."
These people have no words to spare, apparently.
NOTE: I just signed in and have to reset my password anyway. I have to change it at least every 90 days. It has to have weird punctuation, numbers, upper and lower case letters. No wonder I couldn´t remember the original one.
I´m in. My profile says: "Qualified". Exactly like the USAFA page whose password I do remember.