Setting up a Site with a Subdomain

My new site is 'mynewsite.net'.

I have a subdomain 'mysub'.

In my winhost account I have a directory 'mynewsite'.

In that I have the subdomain directory 'mysub', ie from my root winhost directory 'mynewsite/mysub'

I can type in my url in the browser 'mynewsite.net/index.html' and everything works fine.

BUT when I try to get to the subdomain, it goes nowhere. I type in the url in the browser 'mysub.mynewsite.net/index.html'.

What am I doing wrong?

<?xml version="1.0"?>
<configuration>
<location path="index.aspx">
<system.webServer>
<httpRedirect enabled="true" destination="index.html" httpResponseStatus="Permanent" />
</system.webServer>
</location>

<system.webServer>
<rewrite>
<rules>
<rule name="mynewsite.net" stopProcessing="true">
<match url=".*" />
<conditions>
<add input="{HTTP_HOST}" pattern="^(www.)?mynewsite.net" />
<add input="{PATH_INFO}" pattern="^/mynewsite/" negate="true" />
</conditions>
<action type="Rewrite" url="\mynewsite\{R:0}" />
</rule>
<rule name="mysub.mynewsite.net" stopProcessing="true">
<match url=".*" />
<conditions>
<add input="{HTTP_HOST}" pattern="^mysub.mynewsite.net?" />
<add input="{PATH_INFO}" pattern="^/mynewsite/mysub/" negate="true" />
</conditions>
<action type="Rewrite" url="\mynewsite\mysub\{R:0}" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>

 

Thanks for the reply.

I purchased the domain through Winhost.

1. I have done
Winhost Control Panel > Sites > the domain name > Subdomain Manager

However, since this is my SECOND purchase of a domain name from Winhost, it does not appear I can create subdomains on my new website. I can still create subdomains on my old website domain.

2. When I ping mynewsite.net it works.
When I ping mysub.mynewsite.net it does not work.

3-5. I purchased this new domain through Winhost, so I believe all of 3-5 should be done in Winhost.