Forerunner Gaming

So, I have two accounts, an old and a new one, I gave this one (MajorGaming) to my younger brother and am trying to sign in on my other account (|SideScroller|) but it won't let me, I go to sign in and it just puts me on the main page of the froums and says sign in, and im also wondering if its cus i already have a forum account on this pc.

Any help would be appreciated.

Try changing your name to something random, sign in, then change it back.