Error msg This operation requires that Microsoft Professional 2013 is installed when using Sharepoint 2013

Hi,

I've recently installed Microsoft Project Professional 2013 and was successful at updating a SharePoint task list from within Project. However if I click on the Task list in SharePoint 2013 I get the error message; "This operation requires that Microsoft Project Professional 2013 is installed." Of course I have Project Pro installed and I've even tried repairing the installation but the problem remains. Has anyone seen this problem before? Any ideas on how to fix it?

Thanks in Advance,

Mark E.

SharePoint 2013 Online (Office 365)

Microsoft Project Professional 2013

Windows 7 Home

Learning SharePoint