Why is the Textlable not changing?

Can someone help me fix this, when I tested this the BoolValue Owneda changed but the text didn't.

while true do
	if (script.Parent.Owneda.Value == true)
		then
	script.Parent.Owned.Text = "Owned"
	end
	end

Is it a normal script or is it a local script, because normal scripts don't work that well with Gui's, if it is on a script then I suggest changing it to a local script and see if it works, if you do need it to run on a normal script for other reasons, then I would suggest putting a remote event to fire to the client, Hope that helps!!