title: Google Publisher Tag(GPT) ad call returning a bad request
body: <p>We are trying to convert DFP ad calls on our site into GPT ad calls with asynchronous rendering with single request mode. We arte trying to make a proof of concept page with ads. But the page doesnt seem to display any ads..... Below is the code I modified from <a href="https://support.google.com/dfp_premium/bin/answer.py?hl=en&amp;answer=1638622&amp;topic=28788&amp;ctx=topic" rel="nofollow">https://support.google.com/dfp_premium/bin/answer.py?hl=en&amp;answer=1638622&amp;topic=28788&amp;ctx=topic</a></p>
  
  <p>Seems to receive a bad request in response to the ad call...and the ad divs are empty</p>
  
  <pre><code>&lt;html&gt;
  &lt;head&gt;
  &lt;script type="text/javascript"&gt;
    var googletag = googletag || {};
    googletag.cmd = googletag.cmd || [];
    (function() {
      var gads = document.createElement("script");
      gads.async = true;
      gads.type = "text/javascript";
      var useSSL = "https:" == document.location.protocol;
      gads.src = (useSSL ? "https:" : "http:") + "//www.googletagservices.com/tag/js/gpt.js";
       var node =document.getElementsByTagName("script")[0];
       node.parentNode.insertBefore(gads, node);
     })();
  &lt;/script&gt;
  &lt;script type="text/javascript"&gt;
    googletag.cmd.push(function() {
      googletag.pubads().set("adsense_background_color", "000000");
    });
  &lt;/script&gt;
  &lt;script&gt;
    googletag.cmd.push(function() {
      googletag.defineSlot("/N6752/adj/hw.bd/home",[728, 90], "div-gpt-ad-123456789-0")
        .addService(googletag.pubads());
      googletag.defineSlot("/N6752/adj/hw.bd/home", [300, 250] , "div-gpt-ad-123456789-1")
        .addService(googletag.pubads());
       googletag.pubads().enableSingleRequest();
       googletag.enableServices();
     });
   &lt;/script&gt;
  &lt;/head&gt;
  &lt;body&gt;
    &lt;div id="div-gpt-ad-123456789-0" style="width: 728px; height: 90px"&gt;
      &lt;script type="text/javascript"&gt;
        googletag.cmd.push(function() {
        googletag.display("div-gpt-ad-123456789-0");
        });
      &lt;/script&gt;
    &lt;/div&gt;
      &lt;div id="div-gpt-ad-123456789-1"&gt;
      &lt;script type="text/javascript"&gt;
        googletag.cmd.push(function() {
            googletag.display("div-gpt-ad-123456789-1");
        });
      &lt;/script&gt;
    &lt;/div&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>