Combo2.Enabled = True

Private Sub CargarCombo2()
Conect
opDB
SQL = "select * from servicio where cod_establecimiento='" & Combo1.Text & "'"
openRS
Combo2.Clear
    While RST.EOF = False
        Combo2.AddItem RST(0)
        RST.MoveNext
    Wend
    Combo2.Enabled = True
cerrar
End Sub

If RST.EOF = False Then
    Label2.Caption = RST(1)
    While RST.EOF = False
        Combo2.AddItem RST(0)
        RST.MoveNext
    Wend
End If

Private Sub Form_Load()

Consulta.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source= " & App.Path & "\bd1.MDB;Persist Security Info=False"
Consulta.RecordSource = "SELECT * From usuario"
Consulta.Refresh

End Sub

 Consulta.RecordSource = "SELECT nombre_usuario as Nombre , red_minsal as Red Minsal, numero_externo as Numero Externo From usuario where a ='" & Combo2.Text & "' ORDER BY nombre_usuario"
Consulta.Refresh