session data lost after session regeneration

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C#

ASP.NET

session

hi,
I have regenerated my session on login page and set session["xx"}="yy"; in some of the variables.
but after redirecting to home page session data is lost.
Can anyone tell me about this problem. Here is the code for session regeneration.

SessionIDManager manager = new SessionIDManager();
manager.RemoveSessionID(System.Web.HttpContext.Current);
var newId = manager.CreateSessionID(System.Web.HttpContext.Current);
var isRedirected = true;
var isAdded = true;
manager.SaveSessionID(System.Web.HttpContext.Current, newId, out isRedirected, out isAdded);