zorglub on "[Plugin: Contact Form 7] Multi lines textarea"

Hi,
I know this topic has already been discussed, but it's still without an issue. I would like to use the multi lines trick for textarea applying this :
Your Message
[textarea your-message]
default value for a textarea
can be multi-line
like this
[/textarea]
and I obtain an empty textarea and the text out off the textarea field.
thanks for helping me

http://wordpress.org/extend/plugins/contact-form-7/