My Macbook only works when plugged in

My mac won't stay on/ turn on without being plugged into my adapter. I just got a new battery for it because that's what the apple store told me to do but i still can't unplug it without it turning off. It says the battery is not charging and I can't figure out why. I feel like it's a simple problem but I can't solve it.

How long have you had the computer? Maybe there is something wrong with the actual computer and the connector for the battery.

i've had it since august 08 and it just went to the apple store to be looked at to see if there was anything wrong and they said no.

I'd try resetting the SMC, and if that doesn't do the trick, get on back to Apple.
http://support.apple.com/kb/ht3964

well i took it back to the apple store and they replaced the dc connector? and that didn't fix the problem so they replaced the logic board all free of charge.

thanks

excellent news