Dell XPS M1330 :: AC Power Adapter Type Cannot Be Determined?

This problem actually popped up on me a few months ago, but I was able to remove and insert the power cord a few times and the message would go away and I would be able to charge my battery. But as a month or two passed, it became more finicky, and I had to jiggle with it a little more, but still, I was able to charge my battery and use my laptop wire-free.

Now today, I've been trying all day, and cannot for the life of me get the battery to charge. I get the following message when I plug the wire in.

"The AC power adapter type cannot be determined. Your system will operate slower and the battery will not charge. Please connect a Dell 65W AC adapter or higher for best system operation."

Also, I think its worth nothing that a lot of people mention that this error message comes up while they are booting their Laptops, mine only comes up once Vista is loaded and I attempt to reinsert the cord.

So, I have tried another Dell charger, a 90W one, and the same problem does occur (My original is a 65W). I am planning on getting a different battery tomorrow to see if it is the battery, as this ones usable life was getting quite low, down to barely a half hour per full charge. My warranty, although I'm not sure of the specifics, was not expired when this problem first came up, but is now expired by I would say 2 months at the most.

Oh, I have a M1330, and I have gotten a lot of use out of this laptop