Slider isn't in the center of my page

Hi. I’ve used the Promotion Slider in my index page. It’s a page created by me, and I’ve added a slider using the [promoslider] label. I’ve been able to fit it into the size I wanted to, but it isn’t centered in the page. What can I do? This is my page: http://www.carlosjordanfotografia.com

Thanks a lot.

http://wordpress.org/extend/plugins/promotion-slider/