It will only work with 32bit version of Outlook.
How do i know which version of Outlook i have?
Open Outlook 2013 and click File in the top left hand corner. Now click Office Account, then About Office 2013. The version type will be displayed on the right hand side. You will have either 32-bit or 64-bit.
If that didn’t solve your problem check so you don’t have Internet Explorer 2011 it is not compatible with that version.