In fact I changed the method as the conquests achieved appear. So some players are not able to complete them it was necessary to delete the data and start the game again. But I think I just solved it. :) Thanks for comment.
It's a firefox issue.. i tried everythinks I could to slove it but without succes...
edit: I tried a new thing to solve this save issue; could you try again to see if it works? (new game, play 30s, return to main menu, close firefox, re-open and check if you can load your save) thanks a lot in advance!
In fact I changed the method as the conquests achieved appear. So some players are not able to complete them it was necessary to delete the data and start the game again. But I think I just solved it. :) Thanks for comment.