MacBook Pro won't Charge?

My Late 2011 MacBook Pro won't charge. The charger is fairly new(less than a year old) and seems to be working fine. The LED lights up, and when plugged in, my screen brightens. But its not charging the battery. I plugged it in before bed last night when it was at 32%, and woke up and it was still at 32. The battery icon has the charging symbol, but it says that it is not charging, and using the power adapter as a power source. I tried running the diagnostic, but as I held D before the gray screen, nothing happened. It just stayed at the gray screen. Anyone have any ideas besides staying plugged in at all times?

Thank in advance for any help