SET ARR in IIS7 as reverse proxy server to Sharepoint 2013

Hi All, 

Can anyone help me with it?

I set URL rewrite rule in ARR IIS7 to route any request including "hz" to my sharepoint server ( VSVR059125) as below web.config describe 

<rewrite>
            <rules>
                <rule name="SharePoint content retrieve URL rewrite Rule" enabled="true" patternSyntax="ECMAScript" stopProcessing="false">
                    <match url="^/hz/(.*)" ignoreCase="false" />
                    <action type="Rewrite" url="{C:0}VSVR059125/{R:0}" appendQueryString="false" logRewrittenUrl="true" />
                    <conditions>
                        <add input="{CACHE_URL}" pattern="^(https?)://" />
                    </conditions>
                </rule>
            </rules>
        </rewrite>

But when i try to test with "http://localhost:8100/hz/common/SiteAssets/Lists/News/AllItems/test.jpg" on local server(IIS locate) IE , always get "404  resource not found error" . it seems the URL rewrite rule doesn't work as i want to IIS ARR can route this request to Sharepoint sever (VSVR059125) to handle . 

Can anyone help me why this URL rewrite rule can't do what i expect?

Thanks

Vincent