i must do a challenges again when i use another computer, how can i fix that ??
No, you don’t have to. Go to http://freecodecamp.com/RoastedChicken and you will see your progress.
Or did you use another login method? In which case you can contact freecodecamp`s team.
BTW: You will only have to do the challenges with an asterisk (shown on the map), so you can just continue for now.
oh thank you very much