B4J Question I'm wrong

Public Sub subRoutine1 (alfa As List, beta As Map) As String
    alfa.Initialize
    beta.Initialize
    '
    alfa.AddAll(Array As String("One", "Two", "Three", "Four", "Five"))
    '
    beta.Put("ciao", "Hello")
    beta.Put("mondo", "World")
    '
    Return "why doesn't the value return?"
End Sub

gamma = demo.subRoutine1 (list1, map1)
Log(gamma)

Dim string1(1) As String
demo.subRoutine1 (list1, map1, string1)
...
Log("? " & string1(0))

Public Sub subRoutine1 (alfa As List, beta As Map, gamma() As String)
   ..
   gamma(0) = "why doesn't the value return?"
End Sub