query expression order is not working

Hello,

In Javascript ,i Am trying to query data using the following code ;

var selectedOptionset = Xrm.Page.getAttribute("crm_type").getSelectedOption();

var optionValue = selectedOptionset.value;

var ConditionRequest1 = new Sdk.Query.ConditionExpression("incident",
"crm_type",
Sdk.Query.ConditionOperator.Equal,
new Sdk.Query.OptionSets([optionValue]));




var queryIncidentBorn = new Sdk.Query.QueryExpression("incident");
queryIncidentBorn.addColumn("incidentid","createdon");

queryIncidentBorn.addCondition(ConditionRequest1);
queryIncidentBorn.addOrder("createdon", OrderType.Ascending);



results = Sdk.Sync.retrieveMultiple(queryIncidentBorn);

i have  got an errorr that the ordertype is not defined