I've killed the dragon (Sahloknir) that came from the first dragon-grave, and the quest says I need to talk to Delphine, but I can't. She just gives me a quick reply (not a dialog), which is something like "Just look at that", and nothing happens. Also, the dragons body just stays there as a rag-doll, and doesn't burn up like the previous ones have done. I'm STUCK because of this bug.

The problems began when I went to get the dragons horn in the previous dungeon. None of the levers worked, I couldn't get the shout at the altar beside the waterfall and the red stones didn't light up, so I wasn't able to pass through the gate-puzzle. But then I loaded back to a previous save before the dungeon, and went to the dungeon again, and everything worked just great. But now I'm stuck again, and this bug is really horrible because I just can't continue my main quest! What to do?!?