Ok,I have research to find how to fix it,
then I find this:
http://forums.filefront.com/sw-kotor2-problems-errors-help/335198-tsl-patcher.html)
"You're picking the wrong path directory I think. When you select your game directory folder, you have to open the TSL file, but ONLY highlight the folder itself, nothing inside it. DO NOT highlight the override file or anything else, just the KOTOR2/TSL file."
If he say is ture,
then I will go back to the old problem: how to select my game directory folder??"
because he said "highlight the folder itself",
where to highlight the folder??
If he mean in window,
I have try it and it still never change.