Trouble with tables

So i’m working on this page for a site a friend of mine has done. I’ve basically got everything down, using his style sheets and layout format but now i’m having some trouble. There are supposed to be 3 columns in a row on this page but the 3rd column keeps getting pushed to the bottom of the page and i don’t understand why.
Here’s a copy of the html as a text file

any help would be appreciated