I am not able to work with Microsoft Outlook 2007. It is not working when my system get backs from sleep mode. I have Vista business edition installed in my system. I had upgraded from Office 2003 to Office 2007. And the issue only appear when the system comes back from sleep mode. On awaking the system when I click on the Outlook icon in the system tray, it freezes and then system did not work well. I am not able to understand the issue behind this. Other applications like a web browser or chat application works quiet well.