04-20-2017 06:16 AM
Are you receiving any error messages when it is crashing? or is the addin in the Inactive section of Addins.
If you could provide the version of Windows and Office it would also be helpful!
05-22-2017 05:57 AM
Please check the solutions in the following Knowledgebase article under the heading "The Act! Add-in is disabled or not configured to load in Outlook":
There is also some further solutions in this article: http://kb.act.com/app/answers/detail/a_id/37366