ie html contditional tage is not responding when using ie conditions

If you have a problem that ie tag is not working and the css file that you assign for this tag is not loading then the problem may be as I found it in the tag spaces. there must be no space in the tag before "If" and after ie9 .like what you see here :

<!--[if lt IE9]>
    <link rel="stylesheet" type="text/css" href="/assets/css/ie.css" />
<![endif]-->

 that mistake can happened if it like the following:

<!--  [if lt IE9]> or <!--[if lt IE 9]> or  <!--[if lt IE 9]  > 

also

<!  [endif]-->  or <![endif]  --> 

Note: Microsoft Stopped supporting IE condition tag in IE-10 and later Versions