Order By Not Ordering Month Names The Way I Want

Ok ok ok - I'm not very good at this, but I can't figure out how to get the 'order by' statement working correctly. It's ordering the 'ReportDate' column alphabetically and not by month order. Anyone help?

select id,
DATENAME(mm,ReportDate) As ReportDate,
max(items) as Items
from mytable
group by id, DATENAME(mm, ReportDate)
order by id, ReportDate


Output:-
id ReportDate Items
240 July 16024
240 June 14705
240 October 19392
240 September 18979
241 August 29542
241 July 27806
241 June 27500
241 October 30007
241 September 29961


As you can see, the months are coming out alphabetically and not in month order.

Any advice appreciated, especially constructive advice