speed up to select distinct

I use the tipical ado connection and VB& to set an Access MDB.

Code:

---

Public Sub CHECK_CONNESSIONE()

    ENVIOR = ""
    ENVIOR = VBA.Environ("COMPUTERNAME")

    If CONN Is Nothing Then
        If ENVIOR = "SS-72D68331754B" Or ENVIOR = "MY-F554C8E61153" Then
            Set CONN = New ADODB.Connection
            With CONN
                .ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\ASS_MF\DATABASE\BA.mdb;Persist Security Info=False"
                .CommandTimeout = 0
                .CursorLocation = adUseClient
                .Open
            End With
        Else
            Set CONN = New ADODB.Connection
            With CONN
                .ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\\1234567\345677$\FSRM107\Ge_O\DATABASE\BA.mdb;Persist Security Info=False"
                .CommandTimeout = 0
                .CursorLocation = adUseClient
                .Open
            End With
        End If
    End If

End Sub

---

Into table1 are approx 180.000

into table are a filed named DATES (is just indexed, dupes YES)

i open the recordset of DATES (as date short) with to select distinct dates:

Code:

---

Dim objCommand As ADODB.Command

    Set objCommand = New ADODB.Command
    With objCommand
        .ActiveConnection = CONN
        .CommandText = "SP"
        .CommandType = adCmdStoredProc
        Set RS = .Execute
        Set objCommand = Nothing
    End With

---

SP query:

Code:

---

SELECT TOT.DATA_OPE, TOT.SP_MF
FROM TOT_ASSEGNI
GROUP BY TOT.DATA_OPE, TOT.SP_MF
HAVING (([TOT].[SP_MF]="SP"));

---

possible the time to return recordset is approx 5 minutes??????????????????????????'