Ok, so I'm practically a Padawan, and the council told me to go to an ancient burial chamber that has been tainted by the dark side of the force. Well, I go there, and it says the door is too thick to cut with a saber, or to pick. So what do i do? It wont let me use my force powers to open it. Do I have to talk to someone about it that will tell me what to do? Please help me!

Go to the grotto. Specifically, check the southeast corner of the grotto.

When you finish up there, the taint should be taken care of.

you should take advantage of the map screen here, you're not supposed to go there yet. have patience young jedi.

opie refers to it as a grotto, but if i remember correctly they call it an ancient grove. not surprisingly it's in the grove section to the south of the map. search that whole area and you should find her... i mean it :)