Roku Developer Program

[neowinston]

I'm trying to show a progress dialog, but it's not working. Here is the code that is in a .xml file and not in .brs file:

    sub showdialog()
      progressdialog = createObject("roSGNode", "ProgressDialog")
      progressdialog.backgroundUri = "pkg:/images/rsgde_dlg_bg_hd.9.png"
      progressdialog.title = "Buffering..."
      m.top.dialog = progressdialog
      m.timer = createObject("RoSGNode", "Timer")
      m.timer.duration = 3
      m.timer.control = "start"
      m.timer.ObserveField("fire", "dismissdialog")
    end sub

Any ideas why? Thanks for your help!