achievements locked yet.

I cannot earn achievements in my surbival world on wifi.

My friend & I used to play minecraft 3-4 hours in our survival worlds daily. but in my world my friend's achievement goes full uninterruptedly as we do anything such as diamond armour or iron armour . But I cannot earn achievements in my worlds . At first I thought it as game glitch . So I re-installed minecraft in my pc . But it is still not working. I had playing a world over 200 days in minecraft world time. But still achievements not started to fill . It always says progress 0% . Skip it. I today compared with my friend & saw that I played a total of 5 days (approx.) & he did 2 days (approx.) . But stats show i killed 0 mobs ,breaked 0 blocks & travelled 0 blocks. How is it possible . I want fix.