I tried, but still dont work this may be a problem with the ML gateway software?mayby ML gateway send wrong commands?

hi I have problem with control volume in my BV7 mk I configuration: Masterlink Gateway control with savant system (connection with Lan cable) TV1: BV7 mk III (master) TV2: BV7 mk I (slave) I have full control of iPad (savant aplication) on TV1 but in TV2 I can only switch on and change source (I can't switch off and change volume level) Do you know