Classic air valve with level 7 and all new o-rings. There are no leaks. The gun airs up, pushs the sear out, ill press the trigger and nothing. Ill also hold the trigger and nothing. Ill let go of the trigger, the sear pops the trigger out again as if its ready to fire. Ill press the trigger and nothing. Ive also adjusted the psi on the classic valve and still nothing. My air tank is a ninja 48/3000 psi with all shims in the ninja reg. Tank has about 2000psi left. Any idea's?