WordPress theme compatible for IE8 problem

I’m currently working in a WordPress theme but I can’t make it works in Internet Explorer 8. Can you help me?

I don’t know how to proceed with this issue, I’m looking for ideas that helping me to fix it!

I tried with this scripts but nothing works:
<script src=”https://ie7-js.googlecode.com/svn/version/2.1(beta4)/IE8.js”></script&gt; (This make an error)

<script src=’https://css3-mediaqueries-js.googlecode.com/svn/trunk/css3-mediaqueries.js’></script&gt;
<script src=”https://html5shim.googlecode.com/svn/trunk/html5.js”></script&gt;
<script src=”https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js”></script&gt;
<script src=”https://oss.maxcdn.com/respond/1.4.2/respond.min.js”></script&gt;

Thank you!