Datumseinschränkung wird nicht akzeptiert

[mkinzler]

SELECT Cast(Date_Completed as Date) as Datum from qguaradm.DELIVERIES d where d.Firm_ID=''32770'' and d.Status <>''--'' and trunc(d.date_completed) between TO_DATE(:Datum_von, ''DD.MM.RRRR'') and TO_DATE(:Datum_bis, ''DD.MM.RRRR'')';