I was cleaning my new M&P 9mmC. All went well taking it apart. I tried putting it back together. The slide went on but I was unable to bring up the take down lever no matter where i had the slide. So I tried to take it apart and start over. Bad idea. Now my slide is jammed in the normal oisition and the take down lever won't go up or down. Can someone help a noobie please with exact steps? Eagerly awaiting your help. I thought I was doing so go. BTW, right now to fix tis, what position should the sear deactivation lever be in? Thanks Cheryl