Webley soft air pistol

I have Webley co2 soft air pistol that was not holding air I was able to take it apart and replace the seals but now have a problem as to how and were the spring that is connected to the hammer go's, I can cock the hammer but when I pull the trigger it will not release the hammer,, it looks like I don't have the spring set up right, doe's anyone know were and how the spring should be placed in the gun.

Thanks for any help