我out了,一直用的
Previous Release version 6.10.3.233 - November 18, 2008
Install Debugging Tools for Windows 32-bit Version
Download the Debugging Tools for Windows
Current Release version 6.11.1.404 - March 27, 2009
Install 32-bit version 6.11.1.404 [16.9 MB]
http://www.microsoft.com/whdc/DevTools/Debugging/default.mspx