Android Question Timer1_Tick Not found

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.

    Dim label1 As Label
    Dim Timer1 As Timer

End Sub

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    Activity.LoadLayout("Layout")
    Timer1.Initialize("Timer",1000)
    Timer1.Enabled = True

End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub
Sub Timer1_Tick
   
    label1.text = "asd"
End Sub