IIS Web Core MapRequestHandler - 404.0 Error when routing .php in IIS 10

I am using URL Rewriting in my page for remove .php in the url. my page is http://xxxxxxxxxxxxx/driver

Everything works great there, but if i go to a page like http://xxxxxxxxxxxxx/driver/about I get 404.

And it works if i use url http://xxxxxxxxxxxxx/driver/about.php

But i whant to remove .php

HTTP Error 404.0 - Not Found The resource you are looking for has been removed, had its name changed, or is temporarily unavailable.

Module     IIS Web Core
Notification       MapRequestHandler
Handler    StaticFile
Error Code     0x80070002
Requested URL      http://xxxxxxxx/driver/about
Physical Path      C:\xxxxxxxxxx\driver\about
Logon Method       Anonymous
Logon User     Anonymous
Request Tracing Directory   C:\inetpub\logs\FailedReqLogFiles

This is my .htaccess

IndexIgnore *
RewriteEngine on
RewriteBase /driver/

<Files *.tpl>
    Deny from all
</Files>
<Files *.inc>
    Deny from all
</Files>

RewriteCond %{THE_REQUEST} ^(.+)\.php([#?][^\ ]*)?\ HTTP/
RewriteRule ^index(.*)?$ index.php$1 [L,QSA]
RewriteRule ^about(/)?$ about.php [L,QSA]
RewriteRule ^contact-us(/)?$ contact_us.php [L,QSA]