If you AA kit is new, call AA with regard to the kit not dry firing.
For your more immediate issue . . . When you pull the slide back a bit, do the slide release tabs pull all the way down? If they do, the AA slide should slide forward and off of the frame. If the slide release tabs do not pull down all the way, try pointing the muzzle end up and then bring it back to level and try the slide release tabs again.
G17, G19(3), G26, G23(2), G27, G21SF, G30SF