Logo in SimplePress theme won't centre

Hey guys, I have a problem and I’ve spent a lot of time trying to fix it but just can’t.

Bascially, I’m using the theme simplepress, and have replaced the original logo image with a custom logo that i made in photoshop that is bigger.

The problem is that this new logo will not centre and remains centred to the right.

This is what my stylesheet looks like in editor:

/*------------------------------------------------*/
/*-----------------[BASIC STYLES]-----------------*/
/*------------------------------------------------*/
body { background: #f6f6f6 url(images/bg.png) repeat-x; color: #525252; font-family: Georgia; font-size: 12px; line-height: 19px; }
a, a:hover { text-decoration: none; color: #000; }
.clear { padding: 0; margin: 0; clear: both; }
.wrapper { width: 960px; margin: auto;}
	#logo { border: none; margin: 73px 2000px 24px 50px; clear: both; }
h1, h2 { font-size: 34px; color: #000; }
h3 { font-size: 24px; color: #000; }
#posts p, .post_full p {padding-top: 15px;}

I changed what comes after #logo in order to try and change the location of the logo image but nothing changes.

What else do I need to do?