From the Internet Explorer >> Tools menu >> Internet Options >> Security tab >> select the zone that CRM runs in (i.e. "Trusted sites") >> click on "Custom Level..." >> change the default "Disable" selection to "Prompt" for the "Initialize and script ActiveX controls not marked as safe for scripting" setting:Thanking you in advance.
Close all the open IE windows and relaunch the Microsoft CRM Web Client - there should now be a prompt "An ActiveX control on this page might be unsafe to interact with other parts of the page. Do you want to allow this interaction?" - click "Yes":