Save/Loading

Good afternoon users, I have a question about creating a simple database for storing variable values in dynamic text:

// Var
score.text = "" + qnt_score.toString();
var so:SharedObject = SharedObject.getLocal("yourso", "/");
// Actions
You_Score += 1;
so.data.highscore = You_Score;
so.flush();
trace("Give a score!")

I tried to run this way, however, unsuccessfully, the score is not saved (or not loaded), the attempt was to make the score save automatically, and load from the click of a button.

Can anybody help me? I'm grateful now!