I have a Marlin Camp 9. I purchased about 3 years ago, went to the range with it a couple of times then put it in storage. I have been busy with my other firearms. It was stored with the bolt open, and today I pulled it out and I cannot get the bolt closed no matter what I do. I am not yet that familiar with this rifle and I feel like a dummy. It is probably something I am not doing right and I am at a loss on this problem. Can any body offer a suggestion?