zmu failed

[CBresso]

Hi everyone,
when I do this :

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zmu -d /dev/video0 -q -v -U user -P Password

I obtain :

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Error, failed to enumerate standard 0: Success

Then I try :

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zmu -d /dev/video0 -V 1 -q -v -U user -P Password

I have this answer :

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Error, failed to get video capabilities /dev/video0: Success

And I can't add a monitor in the console.
What can I do ?
Thank's for your help.
Christophe