Myspace layout problems - HELP PLEASE!!

I have this background image located here:

For some reason, it is way off when I view my MySpace profile. It should be centered, but is off somewhere to the side. How do I fix this?

This is the CSS code used for myspace pointing to it:

body {font-size: 1px; line-height: 1px;background-color:6a8c1a; font-family: Verdana, Arial, sans-serif; background-repeat: repeat-y; background-image: url('http://ispycoupons.com/images/myspace/bg_myspace.gif');background-position-y:center}

What is wrong? Thanks for the input guy (and gals)!

Thanks for the quick reply, daz!

Here's the code the finally got it to work:

body {font-size: 1px; line-height: 1px; background-color: 6a8c1a; font-family: Verdana, Arial, sans-serif; background-image: url('http://ispycoupons.com/images/myspace/bg_myspace.gif'); background-repeat: repeat-y; background-position: center; }