MASingleOptionDescription optionsAndLabels asDynamicObject d'ont work

Hi All, i have one description based on MASingleOptionDescription. Now it work well when define the items with the options:[ MACityModel DataBase asArray] asDynamicObject. But because i need to view more text for any item in the list, i define the options with the method optionsAndLabels:[( MACityModel DataBase asArray) collect:[:itm| Association key: itm value: itm display]] asDynamicObject With it the list is right create but d'ont update at " dynamic time " with new item or change to MACityModel DataBase items. How i can solve my problem ? " I thinks to found the same problem with MAMultipleOptionsDescription " Thanks for any consideration, Dario