Yii Session Logged Out While Saving The Google Map Data For The First Time Login

I am having problem of logout while saving data that are populated using google maps in my web app. I am using Yii framework so please any suggestion

Problem in steps

->I logged in

->Do map( render map + click map + drag map) activity

->When I click on save it save partial data and it should redirect to update section but after saving partial data its session logged out on the way to redirecting to update section and it is redirecting me to login again.

here is the application link


you can logged in with username : nirmal.websanjal@gmail.com Pass : 123456

Thank you waiting good suggestions and solution from any