How do I get IE7-fixes.css to load?

I have an ie6-fixes.css in my Fusion subtheme and it loads fine. I can't remember doing anything special to get it to load. I think it was there from the start. Now I need to fix something on IE 7 and I can't figure out how to get the IE 7 version to load. I have the file in my theme right next to the IE 6 one. This is what I get when I view the source of the page:

  <!--[if IE 8]>
  <link type="text/css" rel="stylesheet" media="all" href="/sites/all/themes/fusion/fusion_core/css/ie8-fixes.css" />
  <![endif]-->
  <!--[if IE 7]>
  <link type="text/css" rel="stylesheet" media="all" href="/sites/all/themes/fusion/fusion_core/css/ie7-fixes.css" />
  <![endif]-->
  <!--[if lte IE 6]>
  <link type="text/css" rel="stylesheet" media="all" href="/sites/all/themes/fusion/fusion_core/css/ie6-fixes.css" />
<link type="text/css" rel="stylesheet" media="all" href="/sites/all/themes/crotheme/css/ie6-fixes.css" />
  <![endif]-->

Is there some place I need to turn on the IE 7 version so it shows up in $ie7_styles in page.tpl.php? I feel like I'm missing the obvious, here, but, well, I'm missing it. LOL!

Thanks,

Michelle