I was at the tune-o-tron part of this site trying to get my own tune book going.
Is it a whole other signing in thing?

It says over there that one sign in is good for the whole site but I am signed in here and it don't work there. I even tried signing in over there but that didn't work

Hey pickinduck
Go to the Concertina.net home page, click on "Register" at the top of the page, read the page that comes up then register there. The forums have a separate registration and you probably have registered here only.