Lolkie

Hi... I've played TSL dozens of times, but never have I tried this before. I had just finished Onderon and I've been to Nar Shaddaa, when I went to Dantooine. Everything seemed normal untill I reached the place, Vrook's supossed to be. There were no enemies, no Vrook and his force cage was off. It was as if, the fight had already taken place. Anyone who knows what to do about this?