Problem with some hidden fields

Question

Hello, I have a little problem with my hidden fields. On page1.aspx I have 4 hidden fields (a,b,c,d) with "runat=server". In my code before Server.Transfer("page2.aspx", true) I put some data to a, b, c, d like this a.value= "1"; b.Value = "2"; c.Value = "3"; d.Value = "4"; On page2.aspx I want to display the data from a,b,c,d but only a and b are passed. c and d are with a blank value . I don't understand what's going on? Someone has any idea? Thanks in advance.