delete startmenu on vista

On Windows Vista,
I can't delete startMenu.
like this:
Delete "$SMPROGRAMS\Myapp\app.lnk"
RMDir /r "$SMPROGRAMS\Myapp"

I can create StartMenu.
But i can't delete StartMenu.
why?
Thanks for help!

See the FAQ.

s

Hey...It's work!
I can use it delete start Menu on vista!
Thank you very mush!