… not accessible.

Hi,
I have this problem already for a while, but was not able to solve it on my own. For new posts I always receive an error message, e.g.: “Aviso: http://www.watchtimebrasil.com.br/noticias/roger-dubuis-apresenta-peca-com-repeticao-de-minutos-e-turbilhao-43984/ é inacessível.” (= “not accessible”)
For older (two-three days) it works fine. I also used the debugging tool from facebook (https://developers.facebook.com/tools/debug/og/object/), but I cannot find the problem.
May be you had this problem before and have a quick solution?
Kind regards,
Tim

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