Master/ slave repeater region for Healbot

Ok I have 2 accounts. When I set up the repeater region on the Master account, it works great. I have 1/2 of a vertical healbot covered, so when I cast chain heal both accounts cast it.
I switch to the slave account, and only the slave is casting. Do I need to set up a second region for the slave? and If I do, which screen should I set it up on?

[lax]

Open up the in-game ISBoxer control panel (ctrl+shift+alt+g by default for WoW) and in the Repeater Regions tab, click Sync. This will sync your repeater regions in all windows. Then it should work from both windows