So yeah i tried with gmail and it worked, so for the other french having trouble with registration and coming on this thread, do not use laposte.net :p
I'm using "laposte.net" (i'm french :p), if it's the problem, i'll wait for a staff member to told me to change (and to permit me to use the same account name if possible :p).
I got exactly the same problem :p maybe some problems with the account validation system ?
PRO Username: DrDidou
Do you have active membership?: No
Your knowledge about PRO: Beginner
We wanna catch'em all please :)