Hi. I am using the Manual focusing function, but the focusing motor won't engage to focus on the spot I select. The focusing motor does work in all the auto focus functions, but not LiveView. I have M/A selected on the lens and have done several resets, cleaned the contacts and tried everything else I can imagine. Is there a secret button I have missed? A piece of my memory card broke off in my camera which led it to read 'No SD Card Inserted.' I pushed tons of buttons and blew air into the card reader before I figured out that problem, so I'm wondering if one of those actions caused this problem. Thank you so much for any help you can give me!