I had to format. I installed Windows 7. I installed War III RoC. I installed War III TFT. I downloaded the 56 MB patch and when i tried to run it it gave me this.

Blizzard PrePatch v2.70 compiled on Jul 7 2003
This program patches Warcraft 3

Log created at 7:14 pm on 01/01/2010

ERROR: unable to authenticate archive

RESULT: Prepatch failed


Help?