How to avoid unnecessary buffering in jPlayer

I have a jPlayer (HTML5 song player using jquery) and it starts to play a song from xx secs of a song.

But the problem is it has to first buffer the XX secs and then starts to play which is waste of bandwidth. Why doesnt it start its buffering from XX secs itself?

Here is the code i use:

$("#jquery_jplayer_1").jPlayer({
        ready: function () {
          $(this).jPlayer("setMedia", {
            mp3: playList[0],
            volume: CUR_VOL
          }).jPlayer("play", 251);
        },
        swfPath: "js",
        supplied: "mp3",
        errorAlerts: false
      });

EDIT

I wanted an answer for avoiding the buffering of first XX seconds.