Outlook 2007 not displaying new email items in inbox or folder until view refreshed by pressing column

I am coming across this issue where a folder shows the message count, but the actual folder display is showing nothing. If a resort is done by pressing a column heading, the message in the folder then display. There is a suggested fix here http://us.generation-nt.com/outlook-2007-inbox-view-does-not-refresh-when-new-mail-received-help-145278971.html to do with Trust Center Settings and Privacy Options in.