you do know you can edit posts right?
get a nail and push on the nipple of the tank.
If air comes out, you know it's your gun. Specifically your asa.
No air? well then this means
1. your tank is not filled. (lol)
2. something else is wrong that I dunno maybe your gauge is off or your reg is malfunctioning.
if it's a problem with your asa, What kind of asa do you have? and what gun?
I know that the piston inside the asa, if it's backwards, it isn't gonna work.