Opacity changes, why can't I get them to work? Options

[protos]

I'm trying to give this site a dark green background behind the blog.

but I want it at 70% opacity

here's everything in his Custom Header:

CODE

<style type=text/css>

.blogbody{

background-color: #004020;
filter: alpha(style=0,opacity=60);
}

.spritead, {display: none; }

</style>

he's got nothing in his website stats

the website is http://www.xanga.com/El_Leachimo