Control panel disappeared

Hi everyone, It's a lot I don't access this forum, this because Gallery has always worked properly (version 2).
Recently I tried to login with admin account, and maybe this trouble may sound stupid, but I was used to see the administration panel on the left column and now I get only navigation links.
At the bottom of the page, I can view "admin" profile selected, so I'm not in the "visitor" mode.
I'm afraid this is only a newbie question, and maybe the answer is very easy, but It really driving me crazy!!