What is the HPR set too? The solenoid will automatically vent if it is being overpressurized. Also verify that you have the springless poppet from the get go- seriously no use in diagnosing without it.
Try a new battery, always Duracell or Energizer, seems silly but it's important to have good power supply to the solenoid.
Then move onto breaking down the bolt system and rebuilding. Start with the 009, 010, and 011 on the firing poppet (front, middle and rear respectively). My next one would be the valve joiner internal (012) oring.
Online manual for reference: http://files.planeteclipseb2b.com/ma...0006V1.0EN.pdf
Or, just look up your nearest service center and send it in for repair: http://www.planeteclipse.com/site/service_centres