Invalid card name


#1

When I go to validate http://www.4wd.com/jeep-parts-resource/zombie-jeep-parts-giveaway.aspx I get an invalid card name but I do not understand why

<!-- START Open Graph, Google Plus & Twitter Card Integration -->
<meta property="og:site_name" content="4WD.com">
<meta property="og:locale" content="en_us">
<meta property="og:type" content="article">
<meta property="fb:admins" content="100003914728533">
<meta property="fb:app_id" content="303368853141113" /> 
<meta property="og:title" content="Jeepers vs Zombies 4WD Giveaway with prizes all Fall long.">
<meta property="og:description" content="Be the Last Man Standing and survive the Zombie apocalypse.  You have three chances to win.  Each person who enters 
will receive a free zombie sticker and a free 4WD.com Jeep parts catalog.  Enter at http://www.4WD.com/Zombies">
<meta property="og:url" content="http://www.4WD.com/Zombies">
<meta property="og:image" content="http://lh4.googleusercontent.com/-TJ0yBP_lTQw/UijuTXIy1SI/AAAAAAAAAmo/IuUZE-jYgas/s0/JeepersVSZombie%2520-%2520OpenGraph.jpg">
<meta property="article:published_time" content="1970-01-01T00:00:00+00:00">
<meta property="article:modified_time" content="2013-09-05T20:55:11+00:00">
<meta property="article:section" content="Sweepstakes">
<meta property="og:video" content="http://youtu.be/GdEHMPIN26A">
<meta property="og:video:height" content="315">
<meta property="og:video:width" content="560">
<meta property="og:video:type" content="application/x-shockwave-flash">
<meta name="twitter:card" content="summary_large_image">
<meta name="twitter:site:id" content="19124765">
<meta name="twitter:creator" content="@4WDHardware">
<meta name="twitter:creator:id" content="19124765">
<meta name="twitter:url" content="http://www.4WD.com/Zombies">
<meta name="twitter:title" content="Jeepers vs Zombies 4WD giveaway contest lasts all Fall.">
<meta name="twitter:description" content="Survive the zombie apocalypse and be the last man standing. Sweepstakes has great prizes in September, October and November.
  Enter at 4WD.com/Zombies.">
<meta name="twitter:image" content="http://lh5.googleusercontent.com/-q8ZFqtfgtbU/UijuSocCLCI/AAAAAAAAAmU/fLGk0kDSenc/s0/JeepersVSZombies%2520-%2520Twitter%2520Summary.jpg">
<meta name="twitter:domain" content="http://4WD.com">
<!-- / END START Open Graph, Google Plus & Twitter Card Integration -->

#2

I currently see no tags on that page. If you add them, I can test again.

Thanks!