CSS IMage Gallery problem

[dmur]

I love the CSS Image Gallery, and am trying to get it working with my images. The eight images on the left side all display properly, but I am having problems with the large image. As I am new to CSS styling, I may be asking a dumb question but how do I get the large image to consistenly align with the top two thumbnail images. Currently the exact duplicated coding display the large image correctly for the top two thumbnails, but then in the next three rows of images, the large image aligns with the top of that row. Aligns with top of 2nd row images for those images, top of 3rd row for those two images. What do I need to add to the CSS styling code to make this work correctly. The only things I have currently on the page are the header and navigation buttons horizonatally across the page.

Thanks