I'm programing in asp.net.
When my page gets to the server side, I'm saving data in the client side (using asp.net hidden fields) in order to use it the next time the page gets to the server.
My problem is that in some pages the data isn't saved. When the page gets into the sever in the second time, the fields are empty!
I know it should work because in some pages it has worked for me.
What can cause the data to be erased/not saved?