Assigning random values from 1-2, not working? Why?

I have this:

MapData.Value = math.random(1,2)
		wait(1)
		if MapData.Value == 1 then

& this

MapData = script.MapData

The MapData is an Integer Value that is a sub or like merged inside the script if you get my drift and why is it not assigning a random value? It is breaking. What is going on?

intergers aren't supposed to work with math.random, u can however try using tostring() or something, I'm confused a lil though... :/