Label not refreshed inside

I have simple timer that print counter in label. The problem is label not imidiately changed the value. Anyone can help ?

here is the code

Code:

  Sub Process_Globals
Private fx As JFX
Private MainForm As Form
Private Label1 As Label
Private Button1 As Button
End Sub

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.SetFormStyle("UNIFIED")
    MainForm.RootPane.LoadLayout("l1") 'Load the layout file.
    MainForm.Show
End Sub

Sub...  

Label not refreshed inside

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