Just purchased a new MacAir 13" ultimate. i7, 8 GB, 512 GB. Just opened the box and turned it on. Everything went as expected except when I plugged in the AC power w/ the new magna connector it doesn't charge. The light isn't on the magna connector and shows not plugged in when you open system report. It started at 93% and now I'm close to 90%. Any ideas why it's not charging? This is my 3rd MacAir. Mid 2010 13" Mid 2011 13" and now Mid 2013 13"