Hiya Fenga. I got your pm but figured I would reply here. This way if I am not able to assist you hopefully someone else can. Sorry to hear you are having problems with the auto root. I found it easier and more of a learning experience to do it manually, which I see from above that you are attempting to do now.
From what I can tell, it looks like you may have something in an incorrect folder. When you open your command prompt and type cd C:\android-sdk-windows\tools and then hit return, does it give you an error by any chance and just sit at the command prompt? I'm thinking that there is a possibility you may have unzipped the folder, but that it is within another folder. Double check that you only have android-sdk-windows as a folder on your C drive. That folder should not be in any other folder.
I am out of town this week with limited internet access, and am currently in the hotel for the evening. The internet here is slow as all hell, but I have managed to find an "un-secure" "linksys" network and that seems to be working better. Anyways, I am on EST and will be going to dinner soon. If you double check the above and are still having problems send me a pm or reply here with a time tonight that I can work with you on this. There is a live chat function on this board that I have found to be very helpful. Again, it is currently 6:38pm EST my time so let me know what works for you and I'll see what I can do.