@JimmyKater thanks for the notification! 
@karem.madoo
Within Outlook you can check if the add-in is available or not. If you navigate in the menu to;
File > Options > Add-Ins > and click 'Manage COM-Add-ins Go. You will get a list alike as this;
In case the add-in does not show please provide the following;
Can you provide me further information regarding to your set up; Which Windows version (32/64 bits) and which Office version plus 32/64 bits.
In case the add-in does show in that list, but it is not checked please select (like in the screenshot) and provide a screenshot, it will tell the error.
Thanks,