It may be a silly question but did you screw the tanks all the way in?
If not, the o-rings may not pass the little hole, although the valve may be already open.
Look if there is some slack between the tank valve and the ASA.
Some tanks have the tip diameter larger than others...
Sometimes it is hard to screw the tank all the way if the ASA adapter internal diameter is small.
I have a Pure Energy that had a similar problem with a Palmer Stabilizer. It was very hard to screw it in.
In my case, Palmer Support adviced me to sand the tip of the tank valve a bit. I did it and I managed to screw it in all the way.
If you try that be very careful not to sand too much. You could damage the valve...