When using 'SetValues' for form elements, an object array with id, value pairs is required similar to :
myform = new Ext.form.Form({ labelWidth : 75 }); myform.add ( new Ext.form.TextArea({ fieldLabel : 'label for box 1', name : 'myfield1', height : 50 }) ); myform.setValues([ { id : 'myfield1', value : '123' }, { id : 'myfield2', value : '456' } ]);