I purchased a new Marlin lever action 30-30 rifle about 6 months ago at Fleet Farm. Was getting ready to use it for the first time and pulled the lever down. It stuck there and will not close. Two friends have looked at it with me and we can't determine why it won't close. I suspect Fleet Farm won't be able to do anything. Do I need to find a gunsmith or is this a known problem with an easy solution?