I hava created a new umbraco site and have been asked to make a mobile site, so I decided I would take advantage of 51 degrees and umbraco however I am struggling can anyone help me with the following.

<redirect
            firstRequestOnly="false"
            mobileHomePageUrl="http://whatsoninsthelens.sth.net/?alttemplate=mobileHome"
            timeout="20"
            devicesFile="~/App_Data/Devices.dat"
            mobilePagesRegex="/(Mobile|Tablet)/"
           originalUrlAsQueryString="false">
      <locations>
           
        <location name="default" url="http://whatsoninsthelens.sth.net?alttemplate=mobileHome">
         <add property="url" matchExpression="http://whatsoninsthelens.sth.net"/>
            <add property="IsMobileDevice" matchExpression="true"/>
     </location>
     
      <location name="category" url="~/{0}?alttemplate=mobileCategory" matchExpression="(?&lt;=/whatsoninsthelens.sth.net)/.*/" >
         <!--<add property="IsMobileDevice" matchExpression="true"/>-->
        </location>
     
      <!--
       <location name="details" url="~/{0}?alttemplate=mobileDetails" matchExpression="" >
         <add property="IsMobileDevice" matchExpression="true"/>
     </location>   
      -->
        
      </locations>
    </redirect>

I have the code above, the homepage doesn't work unless I remove the category location and I am struggling to get the right expression for the category location.

The expression I currently have gets picked up if I call a url such as http://whatsoninsthelens.sth.net/visual-arts/ but a redirect is then done to add the ?alttemplate=mobileCategory but this also matches the expression so it ends up in a loop.

Wondering if anyone can help with this or has achieved this on any sites you have worked on.