selectItem with clientOnly data source problem

Technical Q&A
1

Hi
I am working with firefox3.6 and smartclient 7.0rc1 and
I have a problem with selectItem with clientOnly datasource,
when I load the page, testData caches and did not show correct data, select list didn’t updated and show old values here is my code:

isc.DataSource.create({
  ID:"jobDS",
  clientOnly:true,
  testData:[],
  fields:[
    {name:"id", primaryKey:"true"},
    {name:"name"}
    ]
});

//rpc call, data[0].jobs loaded from db
jobDS.testData = data[0].jobs;

isc.DynamicForm.create({
            ID:"jobForm",
            numCols:5,
            autoDraw:true,
            fields:[
              {wrapTitle:false, name: "jobId", title:"jobs", colSpan:"5",
                editorType:"select", optionDataSource:"jobDS", valueField: "id", displayField: "name",
                validators: [{
                 type:"requiredIf",
                 expression:"return true",
                 errorMessage: "jobid is required"
               }]}

can anyone help me to clear cache?