СУБД: MS Access 2002; Delphi 5

begin
with ADOCommand1 do
begin
Connection:= ADOConnection1;
CommandText:= 'SELECT Min(Message.Time) AS :MinTime, Max(Message.Time) AS :MaxTime FROM Message WITH OWNERACCESS OPTION;';
Execute;
end; // with
fMin:= ADOCommand1.Parameters.ParamValues['MinTime'];
fMax:= ADOCommand1.Parameters.ParamValues['MaxTime'];
end;

Поле Time, fMin, fMax и параметры имеют тип: TDateTime. Кроме того, Direction у параметров типа pdOutput.

Короче, вылезает такая ошибка: ADOCommand1: Parameter 'MinTime' not found??