public string ChangeMyPassword(SystemUser user)
    {
        string ret = "";

        user.Uname = HttpContext.Current.Session["Username"].ToString();
        if (bll.IsRightOldPassword(user))
        {
            user.Passwd = user.Cpasswd;
            ret         = ChangeUserPassword(user);
        }
        else
        {
            ret = "Invalid Old Password";
        }
        return(ret);
    }