Hi Mauro,
The script is more than four months old - it does not work with the current version of the sample.
The only observed way to work with Prof-UIS controls is to expose them by using the Text Recognition technology, so, before running the script, you need to add 
Afx:400000:4803*, 
ProfUIS-DockBar, 
ProfUIS-ControlBar and 
tooltips_class32 class names to the list of accepted windows as it is described in the 
Text Recognition Technology Support help topic. Also, I've made some modifications to the script, try using it:
' Before executing the TextRecognitionSample routine, download the 
' http://www.prof-uis.com/download/samples/win32/All_Prof-UIS_Samples.zip archive, 
' unzip it and run the ProfStudio-m.exe sample application.
Sub TextRecognitionSample
  Dim p, wMain, wMenu, strItem
  Set p = Sys.Process("ProfStudio-m")
  Set wMain = p.Window("Afx:400000:8*", "*")
  wMain.Activate
  Set wMenu = wMain.Window("ProfUIS-DockBar", "Text Editor").Window("ProfUIS-ControlBar", "Menu bar")
  strItem = "File|New"
  If ClickItem(wMenu, strItem) Then
    Log.Message "The '" & strItem & "' menu item was successfully clicked."
  End If
End Sub
Function ClickItem(wMenu, strItem)
  Dim p, arrayItem, menuItemObj, wSubMenu
  
  ClickItem = False
  arrayItem = Split(strItem, "|")
  If Not ClickChild(wMenu, "Text", arrayItem(0)) Then
    Exit Function
  End If 
  Set p = getProcess(wMenu)
  Set wSubMenu = p.Window("Afx:400000:4803*")
  If Not ClickChild(wSubMenu, "Text", arrayItem(1)) Then
    Exit Function
  End If  
  ClickItem = True
  Log.UnlockEvents
  Log.Event "The '" & strItem & "' menu item was clicked."
End Function
Function ClickChild(wMenu, strProp, arrayItem)
  Dim menuItemObj
  ClickChild = False
  Log.LockEvents(1)
  Set menuItemObj = wMenu.FindChild(strProp, "*" & arrayItem & "*")
  If Not menuItemObj.Exists Then
    Log.UnlockEvents
    Log.Error "The '" & arrayItem & "' menu item was not found."
    Exit Function  
  End If 
  menuItemObj.Click
  ClickChild = True
End Function
Function getProcess(obj)
  Do While Not IsSupported(obj, "ProcessName")
    Set obj = obj.Parent
  Loop
  Set getProcess = obj
End Function