[big bad jon]

do you have the velcro backing on the bottom of it? either that, or the little plastic screws? if you don't i'd look into trying to get those...

 

[big bad jon]

hmm, i'm guessing it's due to the velcro not sticking then... if it stuck, i doubt it'd crease in the middle even if there was already a crease in it... see if you can do something about getting the velcro to stick or something.... sorry, i know that's not much help..... just push down real hard on the velcro...