%1 is not a valid Win32 application

Hello all,
    I have some Visual Basic executables that open up files certain files in 
WordPerfect (running WordPerfect 12).  I was recently installing at one of 
my customer's sites and on two of the computers when I try to execute my VB 
exe, I get the following error:
Run-time error '-2147024703 (80070001)':


Automation error

%1 is not a valid Win32 application

I stripped my VB exe down to just the following below which will just simply 
open up WordPerfect and I still get the above error.

Public Sub Main()
    Dim objWP As Variant
    Dim i As Integer
    Dim Docs As String
    Dim File As String

    Set objWP = CreateObject("WordPerfect.PerfectScript")

    objWP.WPActivate

    objWP.Quit
    Set objWP = Nothing
End Sub


I installed Service Pack 1 for WordPerfect 12 but that did not fix the 
problem.  I also ran Windows Update to make sure the Windows (XP Pro) was 
up-to-date as well.  Has anyone seen this error before?

Will
HCSS