Before we can help you out we need to know what the specifications of your laptop are, if your not sure the name of what you bought is fine.
If you arn't sure you can;
1. Right-click "My computer" and click on "Properties"
2. Under the "General" tab (This is what you already see after you click properties)
you should see something like
"System: (Your system version eg. Windows xp)
Registered to: (Whom ever your system is registered too)
and Computer: Post everything this part says.
3. Now click the "Hardware" tab
4. Then click "Device manager"
5. In that list of things looks for "Display adapters" and click the "+" next to it to expand it, post what you see there. If nothing is their or the "Display adapters" isn't listed in there just tell us.