I saw your post about an "error during transaction transmission / error during transaction transmissi.."
That error is the generic message shown when there's an issue during transaction broadcast.
The actual issue should be the message below it.
Depending on it, the underlying issue may be different from this thread that may require a different solution.
Also, I suggest you to post a new topic in French local board for better exchange of words.
Here's the link (
Bitcoin Forum > Local > Français):
https://bitcointalk.org/index.php?board=13.0