one problem di level menù!!

Hello everyone, I created a game is over.
I have only one problem, the menu levels created by me everything works fine, passed level 1 level 2 unlocks, etc. ....
let's say you arrive at level 10, and I want to redo the level 2. finished level 2 is released only level 3!!
all other levels (even if I got to 10) are locked! how to fix this??

What script are you using to make the levels unlock?