How to use windows dualview to add another monitor to a laptop

I have a Fujitsu laptop running Windows XP SP 2. This is a licensed software. Earlier I had attached a CRT monitor and obtained the facility of using the second monitor to open pages different from the one displayed on the laptop LCD screen. I had recently formatted the computer and reinstalled the OS. Since then I have not been able to configure the second monitor to display different web pages. It merely duplicates whatever is displayed on the LCD screen of the laptop. In fact, when I click "Identify", the large figure"1" comes on both the screens. How do I fix this problem.... Thanks... Ashis K Datta