PIE module not working

Hi there!

In my pages.css I have this: (working with Fox/Chrome)

#header .section {
background: rgb(255,255,255); /* Old browsers */
background: -moz-linear-gradient(top, rgba(255,255,255,1) 1%, rgba(200,210,210,1) 80%, rgba(255,255,255,1) 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(1%,rgba(255,255,255,1)), color-stop(80%,rgba(200,210,210,1)), color-stop(100%,rgba(255,255,255,1))); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, rgba(255,255,255,1) 1%,rgba(200,210,210,1) 80%,rgba(255,255,255,1) 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, rgba(255,255,255,1) 1%,rgba(200,210,210,1) 80%,rgba(255,255,255,1) 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, rgba(255,255,255,1) 1%,rgba(200,210,210,1) 80%,rgba(255,255,255,1) 100%); /* IE10+ */
background: linear-gradient(top, rgba(255,255,255,1) 1%,rgba(200,210,210,1) 80%,rgba(255,255,255,1) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ffffff', endColorstr='#ffffff',GradientType=0 ); /* IE6-9 */
-webkit-box-shadow: 0px 4px 8px 0px rgba(0, 0, 0, 40);
-moz-box-shadow: 0px 4px 8px 0px rgba(0, 0, 0, 40);
box-shadow: 0px 4px 8px 0px rgba(0, 0, 0, 40);
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
}

I installed the css3pie module under sites/all/modules, installed the PIE libraries under sites/all/libraries.
I have a website, with multiple css3, so I added the #header .section selector in the configuration settings (I am using D7). Since I saw no change, I checked the generated css file under sites/default/files/ctools/css/randomlettersandnumbers.css
I saw this:

/* css3pie */
#header .section
{
behavior: url(/sites/all/libraries/PIE/PIE.htc);
}

But when I check the page under IE9 _nothing_ happens. I am using a modified version of the Zen theme. The website can be found at http://www.kittyfuggony.hu