formsubit does not work

[bee]

Hi, I am trying same functionality for submit as below, but does not work the alert message never appear even if it is success or failure. I am using extjs 4.0.7

myFormPanel.getForm().submit({ clientValidation:true, url:'updateConsignment.php',params:{ newStatus:'delivered'}, success:function(form, action){Ext.Msg.alert('Success', action.result.msg);}, failure:function(form, action){switch(action.failureType){caseExt.form.Action.CLIENT_INVALID:Ext.Msg.alert('Failure','Form fields may not be submitted with invalid values');break;caseExt.form.Action.CONNECT_FAILURE:Ext.Msg.alert('Failure','Ajax communication failed');break;caseExt.form.Action.SERVER_INVALID:Ext.Msg.alert('Failure', action.result.msg);}}});

[bee]

myFormPanel.getForm().submit({
    clientValidation: true,
    url: 'updateConsignment.php',
    params: {
        newStatus: 'delivered'
    },
    success: function (form, action) {
        Ext.Msg.alert('Success', action.result.msg);
    },
    failure: function (form, action) {
        switch (action.failureType) {
            caseExt.form.Action.CLIENT_INVALID: Ext.Msg.alert('Failure', 'Form fields may not be submitted with invalid values');
            break;
            caseExt.form.Action.CONNECT_FAILURE: Ext.Msg.alert('Failure', 'Ajax communication failed');
            break;
            caseExt.form.Action.SERVER_INVALID: Ext.Msg.alert('Failure', action.result.msg);
        }
    }
});