JQGrid data lost when postback

I am using jqgrid to display the records in my application and the same page, I have checkbox and enabled postback action. when click the checkbox, checkbox change event works properly but jqgrid data cleared. How can I maintain the data and display without any issues?. Also, I checked the source code (Browser right click) and it has jqgrid jquery function available with data but it not displayed in page. I am using rdlc control and scriptmanager in the same page. I really appreciate if anyone give good idea.