my guestbook

I have a webpage for my 3 year old girl...it is quite nice and visted by friends and family offten, the guestbook was a place that mesg could be left for her and so on, and it was used offten. But our loved ones have stoped using it as it has be overridden with spam, and i have forgoten the user name and password that i set three years ago and can not get in to remove the spam......is there a way that i can reset them or find them?

If you would read the stickys marked read these before posting you would find this out.