IIS php rewriter error

[eluser]Unknown[/eluser]

Code:

RewriteEngine on
#hidden index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond $1 !^(index.php|images|robots.txt)
RewriteRule ^(.*)$ index.php/$1 [L]

can use in Apache .htaccess to hidden index.php

but IIS+http.ini can not work, help me,thinks!