Android Question File.WriteList line missing

Sub Globals
    Dim ListSend As List
    Dim ListSend1 As List
End Sub

Sub Activity_Create(FirstTime As Boolean)
    ListSend.Initialize
    ListSend.Add("8858767410646:S7615-12:3020")
    ListSend.Add("8858767410647:S7615-12:3000")
End Sub

Sub Activity_Resume
    File.WriteList(File.DirDefaultExternal,"Barscan.txt",ListSend)
    ListSend1 = File.ReadList(File.DirDefaultExternal,"Barscan.txt")
    Log(ListSend1.Get(0))
    Log(ListSend1.Get(1))
End Sub