Batch Editing not working properly

Sorry. I accidentally click post. Please ignore post above.

I have codes below at javascript:
var grid = $find("<%=RadGrid1.ClientID %>");
var batchManager1 = grid.get_batchEditingManager();
var hasChanges = batchManager1.hasChanges(grid.get_masterTableView());
if(hasChanges) {
    grid.get_batchEditingManager().saveChanges(grid.get_masterTableView());
}
else{
args.set_cancel(true);

window.close();

}


I have code below at code behind:
protected void RadGrid1_BatchEditCommand(object sender, GridBatchEditingEventArgs e)
{
    foreach (GridBatchEditingCommand command in e.Commands)
    {
        Hashtable newValues = command.NewValues;
        Hashtable oldValues = command.OldValues;
        string newFirstName = newValues["FirstName"].ToString();
    }
}

The problem here is sometimes it will not trigger RadGrid1_BatchEditCommand. Please help.