i have emailed said dealer but am yet to hear from them, think il wait till tomorrow if no reply il ring them up. me or my bud not happy.that happend to my vibe as well and theres nothing that you can do because its the board, call up the place that you got the vibe from and tell them whats wrong, then send it back and they sould replace the bored. thats what i done and now its all fixed.... hope this helps
try relacing the battery with a nice new procell, then reducing the pressure all the way down first.
then with the new battery bring the pressure up a quarter of a turn at a time, trying to fire it each time.
sometimes if overpressurised they won't cycle.
also they are a bit picky on needeing well lubed.
as john says try and see how well the bolt moves and add some lube if needed.
you can't adjust the dwell really, except for the CO2/air setting.