Seneca Aspen/Nova Freedom parts list

I just rebuilt my aspen .25, replaced almost every single oring/seal. 80% sure i assembled everything correctly per the assembly guide, however when I try to fill up the gun with the fill probe from an air tank, the air comes straight out the barrel end and the aspens pressure guage does not budge at all. I have rebuilt the rifle a few tile in the past and never had this issue.

Any feedback or suggestions would be much apreciated.
 
@cegd
It is most likely the firing valve. (air release valve)
It is shown, but not numbered, on page 11 of the instructions
Just to the right of Part 9 are the valve and valve spring
Check with Pyramyd Air or Air Venturi, they might still stock them
IIRC the valve used in the original Avenger is an upgraded version of that part

Hope this helps
Edward