Access 2007 Who Is Log On "code" Error Message

Not being a code person. This code worked great for 2003, but we just installed 2007. I get an error message when the this code runs:

Its a complie error
User-defined type not found

Sub ShowUserRosterMultipleUsers()
Dim cn As New ADODB.Connection.....red shows where I get the error message
Dim rs As New ADODB.Recordset
Dim i, j As Long

Set cn = CurrentProject.Connection

' The user roster is exposed as a provider-specific schema rowset
' in the Jet 4.0 OLE DB provider. You have to use a GUID to
' reference the schema, as provider-specific schemas are not
' listed in ADO's type library for schema rowsets

Set rs = cn.OpenSchema(adSchemaProviderSpecific, _
, "{947bb102-5d43-11d1-bdbf-00c04fb92675}")

'Output the list of all users in the current database.

Debug.Print rs.Fields(0).Name, "", rs.Fields(1).Name, _
"", rs.Fields(2).Name, rs.Fields(3).Name

While Not rs.EOF
Debug.Print rs.Fields(0), rs.Fields(1), _
rs.Fields(2), rs.Fields(3)
rs.MoveNext
Wend

End Sub