I would go further Lulu. Make a compaint that it is not mentioned anywhere that the forms needed to be in only the dx before he was 6. See if the Paed can help, perhaps he can ring and get somewhere.
If you don't get anywhere...go to an Ombudsmen or your local member. Mental Health is high on the governments agenda for this election that is coming up, use it to your advantage.
That is just wrong Lulu