I have a Parker BuckBuster 175. After shooting 20 or so times at my target today I hate to say but I forgot to put the arrow in the crossbow and pulled the trigger. I am pretty sure this crossbow has some kind of failsafe device because it didn't fire, that is a good thing. The problem now is that after the 'click!' I can't figure out how to get the arrow back in to fire it. A little thing popped up in front of where the arrow goes in to meet the string and now I can't get the arrow all the way in and it the trigger won't fire. Anybody? Thanks.