TheX -
I use as well. The script works, but it only displays login names. If your user's login name is the same as their publically displayed name, that may be why it -appears- to be working for you.
Go to
http://vvvcentral.com and look on the left-hand side. You'll see posts attributed to me (dansajd). My publically displayed name is different ([VvV]God_Is_Dead). By the way - I LOVE your webpage design and the Flash intro! I wish I had your talents!
Kel - have you tried clearing the cache and/or adding a new post. The HTML file needs to be re-written in order to see changes and that will only happen if a new post is generated.