Vista Task Scheduler weirdness

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I'm attempting to open a program using Visual Basic 2005. Here's my code:

Module Module1
Sub Main()
Try
AppActivate("Th e DownLoader")
Catch
Dim ReturnValue As Double = Shell("C:\Progr am Files
(x86)\Equis\The DownLoader\Dlwi n.exe", AppWinStyle.Nor malFocus)
c: If ReturnValue = 0 Then
Call Wait(1000)
GoTo c
End If
Finally
End Try

End Sub

Sub Wait(ByRef Millisecs As Short)

Dim MarkStart As Double
Dim MarkStop As Double
Dim Cross12AM As Boolean

MarkStart = Microsoft.Visua lBasic.Timer()
MarkStop = MarkStart + (Millisecs / 1000)
If MarkStop >= 86400 Then
MarkStop = MarkStop - 86400
Cross12AM = True
End If

Do Until MarkStop < CDbl(Microsoft. VisualBasic.Tim er()) And
Cross12AM = False
System.Windows. Forms.Applicati on.DoEvents()
If CDbl(Microsoft. VisualBasic.Tim er()) < MarkStop Then Cross12AM
= False
If CDbl(Microsoft. VisualBasic.Tim er()) < (Millisecs / 1000) Then
Cross12AM = False
Loop

End Sub
End Module

If I run this through Visual Studio, it opens the program "The Downloader"
no problem. If I publish and install it, firing the installed program opens
the program "The Downloader" no problem.

So here's where it gets weird. If I set up the Vista Ultimate 64 bit Task
Scheduler to run the installed program it does not open the program "The
Downloader".

I've successfully set up Task Scheduler to run other programs I've written,
so I'm pretty sure I've got all the settings right. If in Task Scheduler I
highlight the task and then hit "Run" under "Actions", "Selected Item", and
then check the task history, it says the action and task were completed
successfully even though "The Downloader" has not been opened.

Any ideas?