Access slave firewall in HA

Hi

Im running fortiOS 5.4.2 and when i try to access the slave fw running the command "execute ha managament <slave id>" it promps for login credentials. My admin credentials dont work there for some reason.

If i reboot the master and the slave now becomes master, same things happens.

In other HA deployments i can access the slave directly with the cli command, no login promt

Maybe a feature from 5.4.2?

Thanks

Carlos