just a shot in the dark but you might have made it live buy accident.. try Modify > Make Live. or it might say Modify > Make Not Live.. just a chance..

or you could have made it a templat.. that would be in the atribute editer for the object.. which you will have to select buy using your outliner.. but thin on the atribute editer, I think its under display or display overrights..

sorry for the not very corect responce but I don't have maya open right in frunt of me at the moment..