Adding background Image to centre_column

[stevebot]

Hi
Can anyone assist me with adding a background image to fit my centre_column correctly? My css is not so great, but I would like to add an image which serves as a background/border to my centre_column, and i'm having all sorts of problems getting it to display properly.
My code at the moment is:

 #center_column {
   width: 556px;
   margin: 40px 50px 180px;
   background-position:top;
   background-image:url(blackgreenbox.png);
   bposition:relative;
   background-size:100%;    
}

You can see an example of how it is going wrong here:
http://thecraa2.miniserver.com/~kieron/product.php?id_product=7

Thanks for any help!
Steve

[MrBaseball34]

Wow, your CSS is all screwed up. I can't tell one column from the other on your URL.