i got it to work. after inflating it manually the first time, then releasing all of the air, i tried opening up the valve again, and this time it inflated itself. who knows how long it was rolled up for at the manufacturers building and the store, it seems to be working now. i guess it just needed to be stretched out.
it doesn't completely fill up like someone stated, but 2 breaths of air and it's good to go... the first time i opened the valve to inflate it, it didn't take in any air. so i think i've got it now.
thanks a lot everyone!