Addition to KB555071
This posting is provided "AS IS" with no warranties, and confers no rights.
In some cases when you try to create IISADMPWD virtual directory and test, you may come across some problems like "Error: object not found". So here I try to provide you more information about our KB article 555071.
Please open a command prompt and register one DLL again,
>regsvr32 %windir%\system32\inetsrv\iisadmpwd\iispwchg.dll
Hope this help.