How many more inches does it need to go? You may need to strip bedding off the bunks and do a better job of folding the tenting to allow the lid to close. When we had ours the electric lift got us close (6-8 inches or so) then we would finish tucking and use the roof clasps to tighten it down until the seal touched all the way around.
2015 Coachmen Freedom Express 292BHDS Blue Ox WDH
2015 RAM 1500 4X2 CrewCab, 5'7'' bed, 3.93 gears, 5.7L 8-speed VVT, Payload 1608, Max tow 10,400