Server Error in '/' Application.

---

[WebException: The remote server returned an error: (400) Bad Request.]
   System.Net.HttpWebRequest.GetResponse() +1751
   HttpWebAdapters.Adapters.HttpWebRequestAdapter.GetResponse() +80
   SolrNet.Impl.SolrConnection.GetResponse(IHttpWebRequest request) +99
   SolrNet.Impl.SolrConnection.Get(String relativeUrl, IEnumerable`1 parameters) +841

[SolrConnectionException: <?xml version="1.0" encoding="UTF-8"?>
<response>

<lst name="responseHeader">
  <int name="status">400</int>
  <int name="QTime">0</int>
  <lst name="params">
    <arr name="facet.field">
      <str>AuthorTitle</str>
      <str>Prefix</str>
    </arr>
    <str name="fl">id, Title, Description, Created, Details, Zip</str>
    <str name="start">0</str>
    <str name="fq">(Type:5) AND (IsRemove:0) AND -(HideDownload:1) AND -(HideAds:1) AND (CategoriesID:0)</str>
    <str name="sort"> desc</str>
    <str name="rows">30</str>
    <str name="version">2.2</str>
    <str name="q">(Type:5) AND (IsRemove:0) AND -(HideDownload:1) AND -(HideAds:1) AND (CategoriesID:0)</str>
    <str name="facet.limit">50</str>
    <str name="defType">edismax</str>
    <str name="qf">Title^10 Files^6 Description^4 Categories^5 AuthorTitle^5 Details^2</str>
    <str name="facet.mincount">1</str>
    <str name="facet">true</str>
    <str name="wt">xml</str>
  </lst>
</lst>
<lst name="error">
  <lst name="metadata">
    <str name="error-class">org.apache.solr.common.SolrException</str>
    <str name="root-error-class">org.apache.solr.common.SolrException</str>
  </lst>
  <str name="msg">Can't determine a Sort Order (asc or desc) in sort spec ' desc', pos=5</str>
  <int name="code">400</int>
</lst>
</response>
]
   SolrNet.Impl.SolrConnection.Get(String relativeUrl, IEnumerable`1 parameters) +1883
   SolrNet.Impl.SolrQueryExecuter`1.Execute(ISolrQuery q, QueryOptions options) +423
   SolrNet.Impl.SolrBasicServer`1.Query(ISolrQuery query, QueryOptions options) +166
   SolrNet.Impl.SolrServer`1.Query(ISolrQuery query, QueryOptions options) +166
   Fonts.Data.FontsDA.Search(RequestOption option, Boolean rss) +7535
   Fonts.Web.Controllers.HomeController.Search_Rss(String kwd, String c, String a, String f, Int32 r, Int32 p) +535
   lambda_method(Closure , ControllerBase , Object[] ) +405
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +35
   System.Web.Mvc.Async.<>c.<BeginInvokeSynchronousActionMethod>b__9_0(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +39
   System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +77
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +42
   System.Web.Mvc.Async.<>c__DisplayClass11_0.<InvokeActionMethodFilterAsynchronouslyRecursive>b__0() +80
   System.Web.Mvc.Async.<>c__DisplayClass11_2.<InvokeActionMethodFilterAsynchronouslyRecursive>b__2() +396
   System.Web.Mvc.Async.<>c__DisplayClass11_2.<InvokeActionMethodFilterAsynchronouslyRecursive>b__2() +396
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +42
   System.Web.Mvc.Async.<>c__DisplayClass3_5.<BeginInvokeAction>b__4() +46
   System.Web.Mvc.Async.<>c__DisplayClass3_0.<BeginInvokeAction>b__1(IAsyncResult asyncResult) +180
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +38
   System.Web.Mvc.<>c.<BeginExecuteCore>b__152_1(IAsyncResult asyncResult, ExecuteCoreState innerState) +29
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +73
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +52
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +39
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +38
   System.Web.Mvc.<>c.<BeginProcessRequest>b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) +43
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +73
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +38
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +431
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +158