CSS vs IEXPLORE

Hi, i´m having troubles to visualize these codes in iexplore. Ffox shows them just fine… http://www.dgmp.com.ar
how can i correct these errors?

<!–
this is a decoration item before the pages name

#pages ul li a:before{
content:” »”;
color:#ff7800;
}
–>
<!–
and these are for the search form and contact form at “contacto” page

input#s, input#wpcf_your_name, input#wpcf_email, input#wpcf_website{
border: 1px solid #999999;
background-color: #fffff;
padding: 3px;
}
#wpcf_msg{
border: 1px solid #999999;
background-color: #fffff;
padding: 3px;
}
input#contactsubmit{
background-image:url(/wp-content/themes/fspring/images/submit.gif);
width:65px;
height:25px;
border:none;
}
input#searchsubmit{
background-image:url(images/search.gif);
width:24px;
height:23px;
border:none;
}
–>

thanks in advanced!
Martin