out bool parameter always false

<pre>
        public bool CheckUser(string firstName, string surname, string email, DateTime dob, out int PersonID, out int CategoryID, out bool terms, out string categoryDesc)
        {
            DataSet ds = new DataSet();
            
            bool userExists = false;            
            PersonID = 0;
            CategoryID = 0;
            categoryDesc = String.Empty;
            terms = false;

            OpenConnection();

            try
            {
                using (ISqlCommand command = CreateCommand())
                {
                    command.SetCommandText(this.CheckUserCommandText);
                    command.SetStringParameter("FirstName", firstName);
                    command.SetStringParameter("Surname", surname);
                    command.SetStringParameter("Email", email);
                    command.SetDateTimeParameter("DOB", dob);

                    command.OpenCommand(ds, "User");                                      
                    
                    try
                    {
                        PersonID = Converter.ToInteger(ds.Tables[0].Rows[0]["PersonID"]);
                        CategoryID = Converter.ToInteger(ds.Tables[0].Rows[0]["CategoryID"]);
                        terms = Convert.ToBoolean(ds.Tables[0].Rows[0]["Terms"]);
                        categoryDesc = Converter.ToString(ds.Tables[0].Rows[0]["Category"]);                         

                        userExists = true;
                    }
                    catch
                    {
                        userExists = false;
                    }                    
                }
            }
            finally
            {
                CloseConnection();
            }
            return userExists;
        }