This is an Outlook registry issue that seems to affecting a number of 64-bit Outlook customers. It's not an Aid4Mail issue but we are providing a fix as it's affecting so many of our customers.
Please download and run this registry fix for Outlook. Simply unzip it and double-click on the file to run it.
http://www.aid4mail.com/download/FixOutlookRegKeys.zip
Should you require any assistance, please don't hesitate to contact the help desk.