I am inclined to believe that you inadvertently created the proble when you disassembled and reassembled the rifle. I would do it again and i would be really careful about making sure everything is going in or fitting as it should. This just seems to be like the most probable thing, being that you recently opened it, so i would try that first.
Craymar!!! thank you!! I pushed the trigger forward and everything worked as it should. It seems that I had set the trigger too light, I am still learning how to finely tune the 2 trigger screws.I was worried that it really was a broken spring.Stija, I had disassembled and cleaned and lubed the rifle last year, and put a couple hundred rounds through it without any problems.I guess there is no substitute for experience, thanks again Craymar.Btw, I love my Fenix.