Outlook 2007 showing old style menu toolbar

This is my new assembled computer running with Windows 7. I bought a copy of Office 2007, installed and activate the same on this PC. Everything is working, all office applications are working good. But today when I launched Outlook for the first time on this PC since installed I noticed that its tool bars and all are classic like we had in Office 2003. Rest all other apps like excel and word are having the new ribbon. Whats wrong with my Outlook ?

Normally there is not much changes made in Outlook 2007 compared to one in 2003. But whatever changes are done, will be visible when you start a message. So tryout sending a test message to anyone and see if you are getting the new look or not.

If not than I guess you or somebody else might have installed few add-ins to make it classic, there are many such add-ins. Ensure the same and if it is there, delete it.