Is the wind under it creating pressure? Happened to me once at the ocean. I had to tie it down to my car front and back waiting for the wind to die down for two days. Finally I got a few guys to hold onto two end straps I had put on as tiedowns, started the M/H motor and slowly turned the M/H around 180 degrees away from the wind, while they held onto the tiedowns and walked it. Looked like they were walking a giant dog. It worked, there was no wind pressure under the awning and it closed right up.
Just a thought that worked for me.
Joe from Ct.