rewrite not working when incoming url is encoded

I'm trying to redirect a url with web.config rewrite

<rule name="Nav Static Redirect 2" stopProcessing="true"> 

  <match url="^Nav\.aspx/Page=/ListNow/Property\.aspx" ignoreCase="true" />  

  <action type="Redirect" redirectType="Permanent" appendQueryString="false"  

     url="http://www.mydomain.com/featured-listings.html" /> 

</rule> 

It works for this url: http://www.mydomain.com/Nav.aspx/Page=/ListNow/Property.aspx?PropertyID=2212548&=&

but not the encoded one: http://www.mydomain.com/Nav.aspx/Page=%2FListNow%2FProperty.aspx%3FPropertyID%3D2212548%26%3D%26

How do I fix this?