Tabbed Browser PopUp Blocker Not Working?

Here is a setting called PopUpBlockerEnabled:And here is my Addhandler code when the browser is being created on form1_load:

AddHandler Browser.ProgressChanged, AddressOf Loading
AddHandler Browser.DocumentCompleted, AddressOf Done
If My.Settings.PopUpBlockerEnabled = True Then AddHandler Browser.DocumentCompleted, AddressOf BlockPopUps

(By the way the setting PopUpBlockerEnabled is true or false when a checkbox is checked)ok so here is my private sub BlockPopUps code:

Private Sub BlockPopUps(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs)
e.Cancel = True
MsgBox("PopUp Blocked")
End Sub

And when i test the popup blocker on this site all the popups show without a single popup being blocked:[URL]