I have had my 100hp for 11 months now. When i bought it last year (second hand) it was serviced by the dealer the day before i picked it up. Although i have yet not done 12,000 miles i was planning to get it serviced next month anyway to keep it annual. However the other day my service light flashed up on my dash, little spanner and a message saying 'service coupon expired' - any reason for this? it has not done the milage and is not due for another month for its annual service either?