Facebook Header doesn't work
===

Why this Facebook header's  doesn't work?

    <meta property="fb:admins" content="100001241265117">
    <meta property="fb:app_id" content="346433102099273">
    <meta property="og:url" content="http://www.fontedelucro.com.br">
    <meta property="og:title" content="Fonte de Lucro - Seu negócio na internet">
    <meta property="og:site_name" content="Fonte de Lucro - Seu negócio na internet">
    <meta property="og:description" content="Blog relacionado a negócios na internet em geral. E-commerce,Programa de afiliados,Novidades entre outros">
    <meta property="og:type" content="website">
    <meta property="og:image" content="http://www.fontedelucro.com.br/wp-content/uploads/2012/07/dolar50.gif">
    <meta property="og:locale" content="pt_br">

When i put the url in post, the header image not show.

The page is http://www.fontedelucro.com.br.