We had similar problem in 2000. Series of 3 freakish storms laid corn flat. There may have been 50 stalks standing in 80 acres field. First reaction was....walk beside with pitchfork and help the stalks off outer edge of cornhead. One round was enuf....hard dirty work and very unsafe! Tried many tricks to get stalks to feed. (Deere 40 series w_metal). Painted entire head with Slip-plate, a graphite based paint. Had to recoat every day. Bolted sickle sections to auger with about .375 inch sticking out to grab stalks. Put on new stalk rolls. Combined one way. Still ultimate solution was Keldermann Corn Reel (www.keldermanmfg.com). It works. Check out site for pictures. Farmers have been known to build ones themselves. One last point is cornhead to ground angle. The cornhead needs to enter the crop at as shallow of angle as possible. Small tires in front of combine, wedge kit on corn head, or 90 series cornhead above 695,000 serial number. Hope some of these ideas help. My entire crop was flat in 2000. Still with patience sold 160+ bpa, and field loss looked at 20bpa. Be careful, and good luck!!!