CSS Help needed - Bug Fix Site.

I am in need of a CSS coder who it able to fix a problem i have with my new website. The problem i am finding, is that my footer is not at the foot of the page, when the content in the middle of the page is not big enough. When i add a doze of lines to the main layer it's OK. please check these : Works ok with content in the middle [login to view URL] without much content - footer rises. [login to view URL] see what i mean ? I've spend 3 hours try to sort out this annoying problem out. Basically i want the footer to main a defined size, remaining at the very bottom of the page. I've tried implementing this solution : [login to view URL];postcount=3 but i am unable to get it to work.