Context issue in IHttpHandler - vb.net

Question

Sorry, this can be a basic question for advanced VB.NET programmers but I am a beginner in VB.NET so I need your advice.
I have a web application and the login is required for some specific pages. To check if the user is logged in, the old programmer used this technique:
Dim sv As New WL.SessionVariables(Me.Context)
If Not (sv.IsLoggedIn) Then
Response.Redirect(WL.SiteMap.GetLoginURL())
End If
Well, I have to use this Logged In checking in a handler done by me and I tried this:
Public Class CustomHandler
Implements System.Web.IHttpHandler, IReadOnlySessionState
Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
Dim sv As New WL.SessionVariables(context)
If Not (sv.IsLoggedIn) Then
context.Response.Write("No access unless you're the CEO!!!" & sv.IsLoggedIn)
ElseIf sv.IsLoggedIn Then
DownloadFile(context)
Else
End If
End Sub
//other code
End Class
Well, the "is logged in" checking is always false (even after I login) and I think it's an issue with the context. So all the other pages works fine with logging checking but this handler have this specific issue.
Can you guys give a helping hand?
UPDATE:
The logged in is done trough this method:
Public Sub SetCreditialCookie(ByVal accountID As Integer)
Me.AccountID = accountID
m_context.Session.Item("loggedInAccount") = accountID
m_context.Response.Cookies.Add(New System.Web.HttpCookie("account_id", CStr(m_context.Session.Item("account_id"))))
m_context.Response.Cookies("account_id").Expires = DateTime.Now.AddDays(5)
End Sub
and to check it it's logged in, this method is called:
Public Function IsLoggedIn() As Boolean
If Not m_context.Session.Item("loggedInAccount") Is Nothing And Me.AccountID = m_context.Session.Item("loggedInAccount") Then
Return True
Else
Return False
End If
End Function
UPDATE 2:
- debugging the code shown that there were multiple kind of logins and I was checking the wrong one with the session.

Answer 1

Due to the use of IReadOnlySessionState, is it possible that the SessionVariables class attempts in some way to modify the Session, which in turn causes an error (possibly handled and not visible to you).
If this is the case it could mean that the IsLoggedIn property is not correctly initialised, or does not function as expected?
Do you have access to the code for the class. If so, try debugging it to see what is happening.