Android Question compilation problem with compiled jar library

Sub Class_Globals
    Private mEventName As String 'ignore
    Private mCallBack As Object 'ignore
End Sub

'Initializes the object. You can add parameters to this method if needed.
Public Sub Initialize (Callback As Object, EventName As String)
    mEventName = EventName
    mCallBack = Callback
End Sub

Public Sub suma (a As Int, b As Int) As Int
    Return a + b
End Sub

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    Private xui As XUI
    Private summ1 As summ
End Sub

Sub Globals
    'These global variables will be redeclared each time the activity is created.
End Sub

Sub Activity_Create(FirstTime As Boolean)
    Activity.LoadLayout("Layout")
    summ1.Initialize(Me, "summ")
End Sub

Sub Button1_Click
    Log(summ1.suma(12,13))
End Sub