page template and content width

I asked this question several months ago and now have a second site and want to do this again. Having trouble again.

Referencing the original time I posed this question: http://wordpress.org/support/topic/expanding-the-content-area-of-a-single-page?replies=5

I have created a second page template, one that does not include a sidebar. The actual page content will expand the width of the new content area, however the white background does not.

http://lvrr.org/calendar/

Any help with this would be greatly appreciated.

Jill