Programmatically Create and Mail enable a contact in Exchange 2003

I am having problems mail enabling a contact in Exchange 2003 after I create it using VB6. I have referenced the following:

cdoex.dll
cdoexm.dll
activeds.tlb

Here is the code I am using (I have changed the actual domain names and stuff):
There is a single command button control on the form called cmdGo.

Option Explicit
Dim oIADs As IADs
Dim oContainer As IADsContainer
Dim strSMTP, strFN, strLN, strDN, strCont, strDom As String
Dim strUserName, strTargetMailAddress, strDomain As String
Dim blResult As Boolean

Private Sub cmdGo_Click()

On Error Resume Next
Err.Clear

strSMTP = "tester@test.net"
strFN = "Test"
strLN = "Contact"
strDN = "Test Contact"
strCont = "CN=Contacts"
strDom = "DC=testlab,DC=test,dc=com"

Set oIADs = GetObject("LDAP://rootDSE")
Set oContainer = GetObject("LDAP://" & strCont & "," & strDom)
Set oIADs = oContainer.Create("contact", "cn=" + CStr(strDN))

oIADs.Put "mail", CStr(strSMTP)
oIADs.Put "targetAddress", CStr(strSMTP)
oIADs.Put "givenName", CStr(strFN)
oIADs.Put "sn", CStr(strLN)
oIADs.Put "displayName", CStr(strDN)
oIADs.SetInfo


If Err.Number = 0 Then
    Call MailEnableCDOPerson(CStr(strDN), CStr(strSMTP), CStr(strCont), CStr(strDom))
    MsgBox "Success!"
Else
    MsgBox "Failure!"
End If

strSMTP = ""
strFN = ""
strLN = ""
strDN = ""
Set oIADs = Nothing
Set oContainer = Nothing

End Sub

Sub MailEnableCDOPerson(strUserName As String, _
                             strTargetMailAddress As String, _
                             strContainer As String, _
                             strDomain As String)

    Dim oPerson             As New CDO.Person
    Dim oRecipient          As CDOEXM.IMailRecipient

    'Target address should look like this
    'strTargetMailAddress = strLastName & "@microsoft.com"

    ' get the user
    oPerson.DataSource.Open "LDAP://CN=" & strUserName & "," & strContainer & "," & strDomain

    ' MailEnable
    Set oRecipient = oPerson
    oRecipient.MailEnable strTargetMailAddress

    oPerson.DataSource.Save

    MsgBox strUserName + " mail enabled successfully"

    'CleanUp
    Set oPerson = Nothing
    Set oRecipient = Nothing

End Sub

The code creates the contact but does not mail enable it. I have poured through technet, MSDN and google, and everything they have given me does not work. Help.