ho fatto così, ma mi rimanda sempre alla pagina d'errore, sia che il record esiste sia se il record non esiste

che posso fare?

codice:
<%
' *** Redirect if username exists
MM_flag="MM_insert"
If (CStr(Request(MM_flag)) <> "") Then
  MM_dupKeyRedirect="sponsor_errato.asp"
  MM_rsKeyConnection=MM_Connessione_Anagrafiche_STRING
  MM_dupKeyUsernameValue = CStr(Request.Form("Cod_Sponsor"))
  MM_dupKeySQL="SELECT Sponsor FROM Anagrafiche WHERE Sponsor='" & Replace(MM_dupKeyUsernameValue,"'","''") & "'"
  MM_adodbRecordset="ADODB.Recordset"
  set MM_rsKey=Server.CreateObject(MM_adodbRecordset)
  MM_rsKey.ActiveConnection=MM_rsKeyConnection
  MM_rsKey.Source=MM_dupKeySQL
  MM_rsKey.CursorType=0
  MM_rsKey.CursorLocation=2
  MM_rsKey.LockType=3
  MM_rsKey.Open
  If Not MM_rsKey.EOF Or Not MM_rsKey.BOF Then 
  MM_rsKey.Close
  End If
    ' the username was found - can not add the requested username
    MM_qsChar = "?"
    If (InStr(1,MM_dupKeyRedirect,"?") >= 1) Then MM_qsChar = "&"
    MM_dupKeyRedirect = MM_dupKeyRedirect & MM_qsChar & "requsername=" & MM_dupKeyUsernameValue
    Response.Redirect(MM_dupKeyRedirect)
End If
%>