After i convert the vb code to c# code into my global.ascx and add InstantForum.DLL as reference to my current application, the code in session_start seem doesn't execute. Below is my code:

string UserID = InstantASP.InstantForum.CookieUtil.GetEncryptedCookieValue("InstantForum_UserID");

if (!(UserID==""))

{

if (InstantASP.InstantForum.Logic.UserExists(Convert.ToInt32(UserID)))

{

InstantASP.InstantForum.Logic.UserLogin(Convert.ToInt32(UserID));

}

else

{

Session["InstantForum_UserID"] = "";

Session["InstantForum_Skin"] = ConfigurationSettings.AppSettings["InstantForum_SkinURL"].ToString() + ConfigurationSettings.AppSettings["InstantForum_DefaultSkin"].ToString();

InstantASP.InstantForum.CookieUtil.SetEncryptedCookie("InstantForum_UserID", "", new DateTime(2000, 1, 1));

}

}

else

{

InstantASP.InstantForum.Logic.GuestLogin();

}

Any one can help me???