That Administrative Template doesn't work because it's wrong. Try this;
CLASS USER
CATEGORY "Additional Settings"
POLICY "Restrict Use of Sticky Keys"
EXPLAIN "This policy disables the use of Sticky Keys"
KEYNAME "Control Panel\Accessibility\StickyKeys"
VALUENAME "Flags"
VALUEON "511"
VALUEOFF "510"
END POLICY
END CATEGORY
Hope this helps ya.