So I've seen people ask this question before, but I can't seem to find a solution...

My workbook keeps saying "Security Warning. Data connections have been disabled." There are NO data connections in this workbook. I've even deleted every macro, deleted every worksheet (only leaving a blank new sheet left) and it still says that. The only way I was able to sort of fix it was by saving the .xslm as a .xls, but that corrupted two of the worksheets, which obviously is not a useful solution. Anybody?

Working in Excel 2011 For Mac and OS 10.8.4

Thanks!