As no admin help finally i abondon openpli 3.0 for the moment
(you can go back to 2.1 version its ok for that parameter, or other image look on the net)
.....sorry again is there any admin who can add WPA2 package to openpli 3.0
or someone who can indicate how to do it....
issue still that with opepli 3.0 its not possible to connect to an encrypted WLAN...