Playing sound

Sound doesn't always play like it should. Can anyone see the problem in the code below?

Code:

  If lblTimer.Text <= "10" Then
        lblTimer.textColor = Colors.red
        Sound.Initialize(2)
        ticksnd = Sound.Load(File.DirAssets,"beep.mp3")
        Sound.Play(ticksnd, 1, 1, 10, 0,0)
End If  

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