DECT M900 - Multi-cell not activating

Hello there.

Im trying to setup a multi-cell cluster with M900 with 530B02 firmware.

As im trying to activate the first antenna, when it reboots the led is flashing green (it has been like this for about 1hour now) and the base wont accept any of the passwords combination im trying (im sure of the password i putted in).

It's not the first time i'm doing a multi-cell with thoses antenna so i know the procedure, but any of you have ever encountered this problem ?

PS: i've tried with differents antenna, even after reset, but still same results...

Any helps/recommandations is apprecieted,

Maxime.