HELP! I can't get my bolt back in

sorry I did not look at the pictures well enough, you need to cock the bolt (pretty sure). using the corner of a table or something, push the round knob (sleeve retaining pin) up the ramp and onto the detent........Hope that is what is going on.
 
Well I feel like an ass, I was trying to get the round knob pushed back to the side to reset the firing pin but I couldn't get it with my fingers. I just used the end of my wooden mallet and voila it works now.

Thanks guys, I know my way around an AR and handguns like a champ but this is the first time I've ever played with a bolt gun