Missing Fonts

Hi,

     In my document there is no fonts missing as manual.  But when i get font list using code, its showing missing font.

     Code:

    var usedFonts = app.activeDocument.fonts; 

    var myArray = []; 

    for(var i = 0; i < usedFonts.length; i++){ 

        if(usedFonts.status == FontStatus.NOT_AVAILABLE){ 

            myArray.push(usedFonts.name); 

                } 

            } 

    if (myArray.length != 0) { 

         alert('Document contains missing fonts. Job aborted!\r' + 'Unavailable fonts:\r' + myArray.join('\r')); 

         exit(); 

         } 

     If i use FontStatus.INSTALLED (ie., not installed) the same result i get.  I dono why??