How to activate race for Gold?

I don't know what I might have done to stop the race, where you can earn some gold bars for being no. 1 to 3, of course you should be going for the first place, which is able to make you a good part of the gold that you need to get in order to be ready for an event which might come out of the blue, and therefore you need to be able to pay for not loosing the bonus items which you have gathered on the way making it possible to get through those levels which you otherwise wouldn't be able to make it through unless you had these specific things! So please tell me, how to get the race started again, now that it's stopped working in my game... I would be very grateful for the answer which would be able to solve this issue!

Thanks for now…