Ошибка в синтаксисе INSERT INTO

begin
ADOquery1.SQL.Clear;
 ADOQuery1.SQL.Add('INSERT INTO maintable (FIO, phone, trable, comments, key, status, adress) VALUES (:FIO, :phone, :trable, :comments, :key, :status, :adress)');
ADOQuery1.Parameters.ParamByName('FIO').value := edit1.text;
ADOQuery1.Parameters.ParamByName('phone').value := edit2.text;
ADOQuery1.Parameters.ParamByName('trable').value := edit3.text;
ADOQuery1.Parameters.ParamByName('comments').value := edit5.text;
ADOQuery1.Parameters.ParamByName('key').value := label1.caption;
ADOQuery1.Parameters.ParamByName('status').value := 'Не начато';
ADOQuery1.Parameters.ParamByName('adress').value := edit4.text;
adoquery1.ExecSQL;
end;

SQL.Add('VALUES');
SQL.Add('(:FIO, :phone, :trable, :comments,');
SQL.Add(':key, :status, :adress)');

ADOQuery1.Parameters.ParamByName('comments').value := edit5.text; 
тут не .value а .asString