ok i had the same problem with my styrafoam..but i simply took it off and its holding fine..the only thing..is the sides..it slants down..i dont kno whats wrong..i think there are missing brackets where i have to clip onto the bumper..but on my old one i dont think there were any brackets..and it held..so im still trying to figure it out..i dont really wanna buy the clips..those brackets look weird..i've never seen those before..