Legend of Zelda: Four Swords Adventure (need help)

[alucard32089]

I have been playing Legend of Zelda: Four Swords Adventure and am on the last level and need serious help. I am up to the point where I have all but 1 moon gem and need to get the 4th one. When I go into the room where the spikes come up out of the floor I use the hammer to drive the little red stakes that are in the corners into the gound. But after I do that and I go into the room below it (the one with all of the stone blocks) I can't figure out what to do. I hit all the red stake thingys, but nothing happens and I can't even move any of the blocks. What do I do?
Please Help!