[Closed] Disappearing Rollout

I’m suffering from a rolloutfloater that disappears after a while.
Anyone know what’s going on ?

this is the script

macroScript SetActiveGrid
category:"eqko"
tooltip:"Set Active Grid"

(
	try (destroyDialog SetActiveGrid) Catch ()

	Rollout SetActiveGrid "Set Active Grid"
	(
		local gridHelpers = for i in objects where classOf i == grid collect i
		local gridHelpersName = for i = 1 to gridHelpers.count collect gridHelpers[i].name
		local appendTogridHelpersName = insertItem "Home Grid" gridHelpersName 1
		
		listbox lb_grids "Available Grids:" items:gridHelpersName selection:0 height:gridHelpersName.count
		button btn_update	"update" width:100
		
		on lb_grids selected item do 
			(
				if item ==1 then 
				(
					if activeGrid != undefined do activeGrid = undefined
				)
				else 
				(
					for obj in objects do 
					(
						if obj.name == lb_grids.selected do select obj
						max activate grid object
						deselect obj
					)
				)
			)
		on btn_update pressed do
		(
			destroyDialog SetActiveGrid
			createDialog SetActiveGrid width:150 pos:[50,100]
		)
	)
	createDialog SetActiveGrid width:150 pos:[50,100]
)