Notes/Domino 6 and 7 Forum : Trouble with MoveUserInHierarchyComplete... "Invalid Approval Request note"

Hi, I am trying to simply loop through the adminP database to try to approve requests for moving user's to a new hierarchy. I successfully obtain the correct document, but I receive the following error:

Invalid Approval Request note - Error #4564

Has anyone solved this problem? Thanks.
Eric

Here is the relevant code:

Dim session As New NotesSession
Dim thisdb As NotesDatabase
Set thisDb = session.CurrentDatabase
Dim cnServerName As String
Dim serverName As New NotesName(thisDb.Server)
cnServerName = serverName.Canonical

' Connect to the AdminP database on the current server
Dim adminpDb As NotesDatabase
Set adminpDb = session.getDatabase("", "admin4.nsf")

' Retrieve the view that contains requests waiting for user action
Dim adminpView As NotesView
Set adminpView = adminpDb.GetView("Name Move Requests")

' Get the first documents from the AdminP collection
Dim adminpDoc As NotesDocument
Set adminpDoc = adminpView.getFirstDocument()

' Set up the AdminP process on the server
Dim adminp As NotesAdministrationProcess
Set adminp = session.CreateAdministrationProcess(serverName.abbreviated)
adminp.CertificateAuthorityOrg = "OU=My OU/O=MyOrg"
adminp.UseCertificateAuthority = True

Dim adminpResponses As NotesDocumentCollection
Dim proxyAction As String
Dim proxyAuthor As String
Dim docType As String
Dim noteId As String
While Not(adminpDoc Is Nothing)
proxyAction = adminpDoc.GetItemValue("ProxyAction")(0)
proxyAuthor = adminpDoc.GetItemValue("ProxyAuthor")(0)
docType = adminpDoc.GetItemValue("Type")(0)

If (Lcase(docType) = "adminrequest") Then
If (Lcase(cnServerName) = Lcase(proxyAuthor)) Then
' If the action is to move the user
If (proxyAction = "6") Then
Set adminpResponses = adminpDoc.Responses
If (adminpResponses.Count = 0) Then
noteID = adminp.ApproveMailFileDeletion(adminpDoc.noteid)
End If
End If
End If
End If

Set adminpDoc = adminpView.GetNextDocument(adminpDoc)
Wend