Just a quick hint, older ML products was not designed to be operated from ML when in option 5 or 6 as prior to the gateway there really was no point 

so many older BeoVisions will not take commands from gateway when they are in option 6, try putting your BV3 in option 2 and remove your BV7 from ML or change it to option 6 so you only have one video master on ML (the sw on BV7 was updated so if you are somewhat up to date you can operate the BV7 while it's in option 6 no problem) I can't remember if a sw update was ever made for the BV3 but check with your dealer they can look it up

next you'll have to redo the MLN assignmen on your gateway for the Two TV'st as the video master always gets address 00000000 on ML 

now I'm sure you can operate your BV3 

hope that helps

Hi there

thank you both, I am not that concerned really to be able to control my BV3 if needed i will replace it with something newer anyway that can pass light commands at least maybe a V1 so i get the on screen display.

I have noticed that now i have lost control over my BS4 and i had made no changes.

After some investigation I can now control my video master and bv6 in a link room.

i have lost control of my bv3 and beosound4 :)

i think my ml does not like the bdoling gateway :)