The floor in the living room slide out in my 2011 Greystone 29MK has detached from the sidewall of the slide out. The slide out contains a fairly heavy factory provided sofa bed. When the slide is drawn in the inner side of the slide out floor is unsupported, riding about an inch above the main living space floor. The weight of the sofa bed simply pushes the slide out floor down until it touches the main floor, separating it from the side of the slide out. The floor of the slide out is fastened to the side of the slide out with several wood screws. These simply are not sufficient to bear the weight of the sofa when when the slide out is drawn in and inner edge of the floor is unsupported. How do I fix this?