字体@helvetica在ie8中不起作用

Question

font face：

@font-face {
    font-family: 'HelveticaNeueLTCom25UltraLight';
    src: url('fonts/helvetica_neue_lt_com_25_ultra_light/helvetica_neue_lt_com_25_ultra_light.eot');
    src: url('fonts/helvetica_neue_lt_com_25_ultra_light/helvetica_neue_lt_com_25_ultra_light.eot?#iefix') format('embedded-opentype'),
         url('fonts/helvetica_neue_lt_com_25_ultra_light/helvetica_neue_lt_com_25_ultra_light.woff') format('woff'),
         url('fonts/helvetica_neue_lt_com_25_ultra_light/helvetica_neue_lt_com_25_ultra_light.ttf') format('truetype'),
         url('fonts/helvetica_neue_lt_com_25_ultra_light/helvetica_neue_lt_com_25_ultra_light.svg#HelveticaNeueLTCom25UltraLight') format('svg');
    font-weight: normal;
    font-style: normal;
}

的CSS：

.form-title {
    font-family: "HelveticaNeueLTCom25UltraLight";
    font-size: 45px;
    padding-bottom: 20px;
}

HTML：

<div class="form-title" style="margin-top:-20px;">
<a href="index.php" class="link">MY NAme</a></div>

以上字体系列在chrome，firefox，safari甚至在ie9＆amp; ie10，但未能在ie8中工作。如何使它在IE8中工作。