title: Ebay findCompletedItems returning null
body: <p>I'm trying to query eBay with a FindCompletedItemRequest but the server is returning null</p>
  
  <p>Heres the code</p>
  
  <pre><code>public static CustomFindingService FindingService(){
  CustomFindingService findingService;
  log.InfoFormat("Connect to Ebay: START");
  
  findingService = new CustomFindingService("XXXXXX-XXXX-XXXXX-XXXXX-XXXXX");
  findingService.UseDefaultCredentials = true;
  
  log.InfoFormat("Connect to Ebay: SUCCESS");
  return findingService;
     }
  
  var fcir = new FindCompletedItemsRequest {keywords = "5mp", categoryId =new string[] {"31388"}}; // 31388 is digital cameras
  var l = FindingService().findCompletedItems(fcir); 
  </code></pre>
  
  <p>I have tried removing categoryId and/switching the keywords nothing seems to help. Debugging has shown me that it is pinging the server just that the server is returning null.</p>
  
  <p>Any Help would be appreciated. </p>