Troubleshoot displaying presence information in Datasheet view

I cannot view presence information in a list.   

Try one or more of the following:

• Verify that the list has one or more columns that look up the User Information list and include presence information. Right-click a column that displays user information, and click Edit/Delete Column. In the Change Column page, verify that the type of the column is Lookup and that it gets its information from the User Information list. At the bottom of the page, make sure the Include presence information check box is selected.

  When a column supports the display of presence information, it displays the Presence () icon before the column name in the column header.

  If a view does not include a column that can display presence information, add a column yourself.

  If you are not signed in to Windows Messenger, do so.

  If hovering the cursor over the cells in the column does not display a Presence icon in the cell, it means the user's e-mail address is not available.

• Verify that the site supports display of presence information. To do this, contact your system administrator.