I don't can put creative commons in my movie. Why ?

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I don't can put creative commons in my movie. Why ? seventhsun 5/6/12 4:14 PM
hello
First, Im french... sorry for my english.

I should put my movie (http://www.youtube.com/watch?feature=player_embedded&v=l6AZEwvw85c) in creative commons, but when to try to click on the button, it is grayed. Why ?

On my other movie, I can ...

Can you help me please ?
Thanks.

Antonin