Scenario 1:

The OnePlaceMail ribbon buttons and tab do not appear when you start Outlook 2010 for the first time. 

Scenario 2:

The OnePlaceMail ribbon buttons and tab do not appear when you start Outlook 2010 after successfully using OnePlaceMail for a period of time.

Scenario 3:

Performing a drag/drop operation to a OnePlaceMail folder in Outlook 2010 does nothing. OnePlaceMail does not appear to be working and the OnePlaceMail menu items and buttons are missing. 

Solution

Solution 1: 

The Outlook process was already running (in memory) when you started Outlook.  Please perform the following (or alternatively, restart your computer) to confirm if this is the case.

• Close Outlook 
• Select Ctrl-Alt-Del and go to the Task Manager
• Select the 'Processes' tab and see if a process called 'Outlook' is listed.  If it is, select the process and hit 'End Process'
• Restart Outlook

Solution 2:

If the OnePlaceMail Add-In has encountered a problem Outlook may mark it as Inactive and Outlook will not attempt to load it from then on.

In Outlook 2010 you can access the "Inactive Items"