png images not transparent in IE6

When I come to view a published lesson using Internet Explorer 6 all png images and buttons don't show as tranparent so you get untidy white borders around them.Lectora publishes to include the following Direct X command that should fix this: DXImageTransform.Microsoft.AlphaImageLoader(src='images/m01_ t01_p01.png',sizingMethod='scale'); }However it doesn't work for some reason. I've got Direct X version 9 running on my machine and the operating system is XP Pro.Does anyone know of a fix for this?ThanksNick

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