You screwed your CSS up, I fixed it so just c/p it the way that it is in this post. Remember to always end your statement with ; and you don't need to keep adding style tags. Also make sure that your css ALWAYS starts with <style type="text/css"> or else it won't work. You also had an extra } too.
<style type="text/css">
<!--
body
{
scrollbar-3d-light-color: #555555;
scrollbar-arrow-color: #555555;
scrollbar-base-color: #555555;
scrollbar-dark-shadow-color: #555555;
scrollbar-face-color: #000000;
scrollbar-highlight-color: #000000;
scrollbar-shadow-color: #555555;
}
a:link {color: #999999;}
a:visited {color: #999999;}
a:hover {color: #888888;}
a:active {color: #888888;}
-->
</style>