[Closed] Enabled checkbox from another rollout but state doesnt change

i made a 2 rollouts with 2 checkboxes…when you execute the script it will change the current renderer to Mental Ray renderer…in the second rollout i have a checkbox that enables/disables final gather in MR…but i wanted to control the checkbox in second rollout through first rollout…i made like this…

try destroydialog test catch()
try destroydialog fg catch()
rollout test "Rollout"
(
	checkbox chk "Enable Below Checkbox" tristate: 1
	
	on test open do
		renderers.production = mental_ray_renderer()
	
	on chk changed state do
		fg.final.tristate = chk.tristate
)

createdialog test

rollout fg "Final Gather"
(
	checkbox final "Enable Final Gather" tristate: 1
	
	on final changed state do
	(
		if final.tristate == 1 then
		(
			mr=renderers.production
			mr.FinalGatherEnable2 = true
		)
		else
		(
			mr=renderers.production
			mr.FinalGatherEnable2 = false
		)
	)
)

createdialog fg

setdialogpos fg [934,478]

the first checkbox can change the second checkbox but Final gather is not updating…