aggiet89 on "revolution Slider"

I don't know how I did this. I was only changing an iframe code on one page and now I keep getting this error "Revolution Slider Error: Slider with alias not found.
Maybe you mean: 'Request' or 'Home' or 'Service' or 'Rental' or 'Services' or 'Specials'" 4 other pages including the one below. Any help would be great !!

http://lalift.com/contact/