redirecting http to https not working on subdomains

for redirecting from http to https i used this code:

<rewrite>
    <rules>
        <rule name="Redirect to https" stopProcessing="true">
            <match url="(.*)" />
            <conditions>
                <add input="{HTTPS}" pattern="off" ignoreCase="true" />
            </conditions>
            <action type="Redirect" url="https://{HTTP_HOST}{REQUEST_URI}" redirectType="Permanent" appendQueryString="false" />
        </rule>
    </rules>
</rewrite>

And its working on my main domain: http://kajsystem.com

but getting error on subdomains! check http://ift.tt/1JIgxC9

I searched anywhere and tried anything, but none of them worked!

My virtual server is Windows Server 2012 with IIS 8