Ours will go up with just a light lift on the bottom of the frame. DO NOT PUT FINGERS IN THE HINGED AREA AT THE TOP OF THE FRAME! If it does not go up easily, there may be a problem with the shocks on the sides that control the travel. Once you start it , the bed should pretty much go up on its own.
Tina & Ted & pooches
2012 Ford F-150 XLT 5.0L V8 4x4 with tow package
Andersen WD hitch with sway prevention
2012 Rockwood UltraLite 2304s trailer