Why is Column Not Over to the Right?

Can anyone tell me why the “Download or Request a Brochure” column in:

http://www.highlycreative.co.uk/test/css-layouts/test13.htm

Is not appearing over to the right of and inline with the Latest News column as I want it to? i.e. I want all four columns in line and level.

Thanks

You’ve got a fixed width of 890px on #container, but the four boxes and the spacing between them add up to more than 890px.