BleepingComputer.com: Power Source Issues

I have a Windows 7 laptop with AMD Phenom II N660 Dual Core Processor 3.00 GHz. All of a sudden (no injury to the cord or anything) my power adaptor doesn't seem to be working properly in powering up my laptop. The light is clearly on on the power adaptor, but when I plug it in to the laptop, my computer laptop still runs on battery power. I just the connection around a little...and then sometimes it may recognize the power source. But for the most part it is as if it doesn't recognize the power source and it still runs on batteries. I am very concerned that eventually this will run out battery since it is now next to impossible to get the laptop to get powered up by the adaptor. Any help would be greatly appreciated! Thanks!

http://defectivekit.com/2007/02/15/guide-to-fixing-a-laptop-power-jack-a-do-it-yourselfer/