The post there is dated 15th June 2005... so Letum - go stand in the corner with a pointed hat with the letter 'P' (for plagiarist) on it.
I am very disappointed. You may not have claimed the work as your own but you certainly did not make any effort to let people know it WASN'T yours.
One unpleasant aspect of my job is that it involves busting about 2 to 3 students per year for doing this kind of thing with term assignments and I am very sad to see it here.