Auto-update fail in window2000

[Agnes]

I try the auto-update program from IIS -
http://sourceforge.net/projects/appupdater
It works find in window2003

However, when I do the same procedure and setup in window 2000 IIS 5.0
it is fail to run the auto update ,some error about "Propfind 405"
Is there any auto-update for window 2000 ???

Please help
Thanks in advance