Can't get dual screens

I just did a clean install of Windows 7 , then reinstalled ATI catalyst manager (selected the proper Windows 7 version from their web site)
- both screens are showing the same thing - they are identical
- Windows 7 does not detect the 2nd screen. When I go to 'Screen Resolution, it only shows 1 screen available
Any solution ?:confused:

This website is not affiliated, owned, or endorsed by Microsoft Corporation. It is a member of the Microsoft Partner Program.