Dude. . . I was messing around forever trying to recover the password to my guestbook. I hadn't edited the settings since I first installed it, so the password had left my memory. I emailed my host and everything asking if they knew how I could retrieve it. In the meantime, I was trying all these different username/password combos trying to see if any would work. Then, all of a sudden, the password popped in my head. I typed it in, expecting to get another error message, and—whadaya know—it worked.
I really need to start writing this stuff down.