Loading problems

I have just started to play this game. I started in career mode and I am on free roam and looking for races, but whenever I get to a race and I accept it just shows the loading screen and the loading bar keeps on going back and forth like always, but it won't load. I have waited 5 minutes and it still won't load. And my computer isn't the problem because everything else loads fine. Can someone please help me with this problem?

BTW I have installed patch 1.2.

Thanks for any help