title: Facebook Open Graph Tags not working correctly in a simple Html
body: <p>I'm trying to use Facebook Open Graph meta tags for my site. I want my links to be showed correctly when I share them in Facebook. But it doesn't. When I test the link in <a href="https://developers.facebook.com/tools/debug" rel="nofollow">Facebook Debuger</a> but it always shows <code>Error parsing input URL, no data was cached, or no data was scraped.</code>. I searched a lot and read the Facebook's documentation about good examples and followed them. But no success. Here is my Page Code:</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html lang="en" xmlns="http://www.w3.org/1999/xhtml"&gt;
  &lt;head prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb#"&gt;
  &lt;meta charset="utf-8" /&gt;
  &lt;title&gt;تست&lt;/title&gt;
  &lt;link rel="canonical" href="www.kaladaran.com"&gt;
  &lt;meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1"&gt;
  &lt;meta name="keywords" content="Product"&gt;
  &lt;meta name="description" content="Product"&gt;
  &lt;!--FACEBOOK--&gt;
  &lt;meta property="og:type" content="website"&gt;
  &lt;meta property="og:title" content="Test"&gt;
  &lt;meta property="og:site_name" content="Kaladaran"&gt;
  &lt;meta property="og:url" content="www.kaladaran.com/test.html"&gt;
  &lt;meta property="og:description" content="Descritption"&gt;
  &lt;meta property="fb:app_id" content="My App Id"&gt;
  &lt;meta property="og:image" content="http://kaladaran.com/Data/1598/6ccec951-f124-43f6-abb0-a59e3d94bd67.jpg"&gt;    
  &lt;meta property="og:image:width" content="250px"&gt;
  &lt;meta property="og:image:height" content="169px"&gt;
  &lt;meta property="og:locale" content="fa_IR"&gt;&lt;meta property="article:author" content="https://www.facebook.com/KDAdsCo" /&gt;
  &lt;meta property="article:publisher" content="https://www.facebook.com/KDAdsCo" /&gt;
  
  &lt;/head&gt;
  &lt;body&gt;
      &lt;div&gt;
          &lt;h1&gt;
              Facebook Open Graph Tag Test
          &lt;/h1&gt;
          &lt;img src="http://kaladaran.com/Data/1598/6ccec951-f124-43f6-abb0-    a59e3d94bd67.jpg" alt="Panasonic" /&gt;
      &lt;/div&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>I can't understand what is wrong with my code? Any help is appreciated in advance.</p>