subform does update on ms/access

I have a "framing" form where I have a control that, when changed, its contents change the "where" clause of a query. They do, and when I review the query, it is OK - the correct set of records is there. This query is the data source of a  subform, that should show the set of selected records.

However, even though I use the "requery" method:

   strSetSQL = "SELECT tabancasBase.codigoTabanca, tabancasBase.NomeTabanca, tabancasBase.Programa, tabancasBase.habitatTabanca, tabancasDemografia.projPop2014, ticketCA.fechoTicket, regioesGuineBissau.nomeRegia, sectoresGuineBissau.nomeSector, tabancasBase.codigoSector "
    strSetSQL = strSetSQL & "FROM ((regioesGuineBissau INNER JOIN sectoresGuineBissau ON regioesGuineBissau.codigoRegiao = sectoresGuineBissau.codigoRegiao) INNER JOIN (tabancasBase LEFT JOIN ticketCA ON tabancasBase.codigoTabanca = ticketCA.codigoTabanca) ON (sectoresGuineBissau.codigoSector = tabancasBase.codigoSector) AND (regioesGuineBissau.codigoRegiao = tabancasBase.codigoRegiao)) LEFT JOIN tabancasDemografia ON tabancasBase.codigoTabanca = tabancasDemografia.RefTabanca "
    strSetSQL = strSetSQL & " WHERE (((sectoresGuineBissau.codigoRegiao)='"
    strSetSQL = strSetSQL & Me.fld_regiao & "'));"
    Set Q44_selectTabancaDef = sireshDB.QueryDefs("Q44_selectTabanca")
    Q44_selectTabancaDef.SQL = strSetSQL
    Set Q44_selectTabancaSet = sireshDB.OpenRecordset("Q44_selectTabanca", dbOpenDynaset)
   
    Me.[sform_listaTabancas].Form.Requery


can anyone help?