Stop push from overwriting values in an array

Hi,

I'm trying to create an array containing scores and usernames which I can then sort and display in a table, but I'm stuck on one issue. When I try to push a second score to the highscores array, it saves again at position 0 rather than adding new data to position 1 and so on. In the following code, myScore contains the score that the user just achieves and myName contains their set username.

var highscores:Array = new Array();
highscores.push({score: myScore, player: myName});
highscores.sortOn("score", Array.DESCENDING | Array.NUMERIC);

for (var i:int = 0; i < highscores.length; i++)
{
  trace(highscores[i].score, highscores[i].player);
}

How can I get this to add to the array rather than overwriting current data?

Thanks.