The card validator says my domain is approved: "*.lmal.tv approved"
It works for some urls: Tweeting this one http://lmal.tv/ccilyon gives me a card in the tweet: https://twitter.com/corsaaaire/status/346276770061881344
But this other page: http://lmal.tv/monpremierchannel gives me a simple tweet: https://twitter.com/corsaaaire/status/346282121167527936
However, if I put this last url in the card validator, it gives me a green light.
What should I do?