Most moronic haunting ever..
Her mother is buried under the boards in the room and instead of protecting her daughter or just simply leading her to the body, the mother's ghost decides "yeah, kill your boyfriend after I tried to kill him and failed.. but yeah, kill him and then try to get my body out".
WTF?
You can make the excuse that the ghost was haunting that place for so long that it went mad (lulz) but even then, that ghost was sane enough to know her daughter and lead her to its body. Doesn't really feel like a insane ghost.
Then there is the stupid family that moves into a new house without actually cleaning out the place and removing old stuff from the attic (who does that? nevermind, I am forgetting movie logic). Or the boy that goes for a walk in the creepy forest where he meets a crying girl who is hot so he brings her home.. what? and parents are OK with it? WHAT?
My god this movie was stupid.