Automatice gearbox problem on Peugeot 406 executive 2ltr. petrol?

Can anybody help? Out of the blue today my 406 auto with 93,000 miles the sports and snow lights started flashing on the dashboard. Does this mean I have a gearbox problem? I have owned the car for three years and have never had a problem with it and these lights have never flashed before. As a matter of interest, the car has been standing, unused, for the last six months and was used today for the first time in six months.