Because you started to play and you don't try to learn by yourself with faq and wiki. And do a topic in random section Please think about what are you doing and search before insta-asking when you have any problem without explanation. I saw your profil and you just didn't played so why do you ask about why you don't level up ><
Maybe he is playing offline or unranked maps so he don't get ranked plays ? Check you are connected to bancho and makes sure the maps you play have a "Global Ranking" scoreboard.