while following the tutorial of gantt using codeigniter

i’m new to dhtmlx and codeigniter.
i followed the tutorial of gantt using codeigniter.
when i delete or update the gantt chart tasks on the web it goes well. but when it comes to adding the task, the database is not updated… does anybody has same problem like me?

here is the link that i looked

docs.dhtmlx.com/tutorials__conne … step1.html


In your Scheduler controller in data action you could enable log for SchedulerConnector object. After that, you could check if there is problems with inserting to database in log.
docs.dhtmlx.com/connector__php__ … #enablelog