Asp.Net Gridivew PageIndexchanging problem

Question

Hi friends,

I am entering children details like sr no, child name and age in a gridview. There is a button called ADD NEW in a footer. When I click on the button the new empty row gets added. I have set the allowpaging property to true and called the function on pageindexchanging. But when I go on second page and again come back on first all the data gets vanishes and empty row remains. Here I have set the page size to 5.

Any help would be appreciated

Thanks,
Vijay