[RESOLVED] List1 ItemData value does not stay persistentent

In a line of code I put a value in List1.ItemData like this:

List1.AddItem RoomName
List1.ItemData(List1.NewIndex) = Index

Ok, ItemData contains the value 2 at this time

This is the only code line that puts a value in ItemData. It is not executed again

Later in another function I use this information like this:

s2 = List1.List(n) ' equals the name of the room I put in it above
n1 = List1.ItemData(n) ' equals 0 but it should equal 2