Got some new arrows back the other day from my bow shop. Got home and whenI went to screw in some field points all but two would screw in. So i tried some broadheads and my muzzy's wouldn't screw in but my RM Snypers would. Last night I got my free Striker in the mail so I thought I would try that. Wouldn't work. Seems like they are not catching the threads to screw down in. Any idea what's wrong? Thanks