I have a link looking like this: ~/find-dealer/dealer?did=1234

But I want a link looking like this: ~/find-dealer/dealer/what-ever-i-want/1234/

I thought this would do it:

<add name="Dealer Rewrite" 
        virtualUrl="^~/find-dealer/dealer/(.*)/(.[0-9]*)/" 
        rewriteUrlParameter="ExcludeFromClientQueryString" 
        destinationUrl="~/find-dealer/dealer?did=$2" 
        ignoreCase="true" />

But all I get is this: The page cannot be displayed because an internal server error has occurred.

This is what the log says: [T69/D31] An unhandled exception occurred System.InvalidOperationException: Sequence contains no elements at System.Linq.Enumerable.First[TSource](IEnumerable`1 source) at Umbraco.Web.Routing.NotFoundHandlerHelper.GetCurrentNotFoundPageId(IContentErrorPage[] error404Collection, String requestServerName, IEntityService entityService, PublishedContentQuery publishedContentQuery) at Umbraco.Web.Routing.ContentFinderByLegacy404.TryFindContent(PublishedContentRequest pcr) at Umbraco.Web.Routing.ContentLastChanceFinderByNotFoundHandlers.HandlePageNotFound(PublishedContentRequest docRequest) at Umbraco.Web.Routing.ContentLastChanceFinderByNotFoundHandlers.TryFindContent(PublishedContentRequest docRequest) at Umbraco.Web.Routing.PublishedContentRequestEngine.HandlePublishedContent() at Umbraco.Web.Routing.PublishedContentRequestEngine.FindPublishedContentAndTemplate() at Umbraco.Web.Routing.PublishedContentRequestEngine.PrepareRequest() at Umbraco.Web.UmbracoModule.ProcessRequest(HttpContextBase httpContext) at Umbraco.Web.UmbracoModule.