I agree with Anna, if there are no signs of mouth rot I would not go trying to pry the snakes mouth open. If you aren't experienced with snakes medically I wouldn't recommend trying it.
Seems you already posted a thread with the same subject.. http://ball-pythons.net/forums/showt...16#post1944016
They told you the same thing, so why are you persistent on opening the snakes mouth? Does it have a swollen bottom jaw, do you see thick cheesy stuff coming out of her mouth?