codice:
<%
dim tempo
tempo = Dateadd("n", -5, Now())
%>

<%
Dim Recordset1
Dim Recordset1_numRows

Set Recordset1 = Server.CreateObject("ADODB.Recordset")
Recordset1.ActiveConnection = MM_amore_STRING
Recordset1.Source = "SELECT * FROM Indirizzi"+ " where ultimaconnessione >#" & tempo & "#"
Recordset1.CursorType = 0
Recordset1.CursorLocation = 2
Recordset1.LockType = 1
Recordset1.Open()
Recordset1_numRows = 0
%>
Il replace non dovrebbe servire... dimmi se così ti funziona...