Thanks for answer – now it works! But I was confused – if there was error in colModel definition – why it works with 3.5.2 – while *ALL* other project files (html,js,php,mySQL db) are the same? And the second one: it's not comfortable (IMHO) to use param 'value' explicitly defined in colModel if I use external URL for dropdown values. May it be optionally allowed preloading these values when init grid: i.e, ajaxSetup: async->false, load data according to editUr(if 'value' parameter is not defined) and fill 'value' parameter, ajaxSetup: async->true, continue init grid