Unresolved dont know username

it is more likely a password problem,

You may have special carachters in your passwrod which 360rev doesnt regocnise,

Click your name on the top right.
then click sign out,
on the left there will be "forgotten password"
click it, you will then receive an email, follow the link in that email.
Another email will be sent to you with the new password,
Enter that exactly with the name you used to sign into the forum.