Did you run List Volume again to confirm what drive letter it assigned to System Reserved partition?
The reason I said to use Assign without giving a letter is because that doesn't always work.
Remember that you have to substitute C with the actual System Reserved drive letter you give it in Steps 6, 7 and 8 here:
http://pcsupport.about.com/od/fixtheproblem/ht/...
Watch your spacing. It must be exact.