Sliding Notification Not Working in XP Classic

[olympus]

I'm using this code:

expandcollapse popup

#include <StaticConstants.au3>
#include <WindowsConstants.au3>

; hotkey pause function
HotKeySet("!p", "pause")

Global $Paused ;Default is unpaused (0=off 1=on)
Global $Paused = 0 ; Default is unpaused (0=off 1=on)
Local $GUIToaster, $text1 = "the"
Local $GUIToaster, $text2 = "slider"
Local $Pos, $i

While 1
    Sleep(50)
WEnd

; hotkey pause function
Func pause()
    Opt("WinTitleMatchMode", 4)
    $Paused = Not $Paused ;changes $Paused from 0 to 1 or from 1 to 0
    If $Paused And Not WinExists("slider", "") Then
        _HorzToaster()
        While $Paused ; while $Paused = 1
            Sleep(10); idle around (pause)
        WEnd
        For $i = 100 To 1 Step -1
            WinSetTrans($GUIToaster, "", $i * 1.5)
            WinMove("slider", "", $Pos[2] - $i, $Pos[3] - 30)
            Sleep(0) ; fast slide-out to right
        Next
        GUIDelete($GUIToaster)

    EndIf
EndFunc   ;==>TogglePause

Func _HorzToaster() ; incorporating code from Danny35d
    Opt("WinTitleMatchMode", 4)
    $Pos = WinGetPos("classname=Shell_TrayWnd")
    If $Pos[2] <> @DesktopWidth Then $Pos[2] = @DesktopWidth - $Pos[2]
    If $Pos[3] <> @DesktopHeight Then
        $Pos[3] = @DesktopHeight - ($Pos[3] + 11)
    Else
        $Pos[3] -= 32
    EndIf
    $GUIToaster = GUICreate("slider", 100, 40, $Pos[2] - 100, $Pos[3], _
            $WS_POPUP, BitOR($WS_EX_TRANSPARENT, $WS_EX_LAYERED, $WS_EX_TOPMOST, $WS_EX_TOOLWINDOW))
    GUISetBkColor(0xFFFFFF, $GUIToaster)
    $label1 = GUICtrlCreateLabel($text1, 0, 0, 100, 15, $SS_CENTER)
    GUICtrlSetFont(-1, 11, 800, 1, "Arial")
    GUICtrlSetColor($label1, 0x000000)
    $label2 = GUICtrlCreateLabel($text2, 0, 17, 100, 30, $SS_CENTER)
    GUICtrlSetFont(-1, 11, 800, 1, "Arial")
    GUICtrlSetColor($label2, 0x000000)
    WinSetTrans($GUIToaster, "", 0)
    Sleep(20)
    GUISetState(@SW_SHOW, $GUIToaster)
    For $i = 1 To 100
        WinSetTrans($GUIToaster, "", 1.5 * $i)
        WinMove("slider", "", $Pos[2] - $i, $Pos[3] - 30)
        Sleep(0) ; fast slide-in from right
    Next
EndFunc   ;==>_HorzToaster

It works great on the default theme of Windows XP whereby when you press 'Alt+p', a notification slides-in above the system tray(clock). But on the Classic theme, I can only see a quick flash on the left bottom side of my screen. Can anyone help me see what the problem is? Thank you.