Yeah the reason it is saying guest is because either you haven't set up a user account for yourself or you set one up but you are not logged in. From the main message board page just click on login and you can either try logging in with an already creatd account, or you can click on "Create New User Account" and create one for yourself. If you wan't the boards to remember you just click, "save password" when you log in and you won't have to worry about it again.