I'm not sure what you want me to check, but I went ahead and excluded the Cutesoft_Client dir from my login checks and it still is giving the same error.

 

if (Session["MySession"]==null)
        {
            if (Url.ToLower().IndexOf("login.aspx") > -1 | Url.ToLower().IndexOf("bio.aspx") > -1 | Url.ToLower().IndexOf("Cutesoft_Client") > -1)
            {
                return;
            }