Vanilla 2

Hi everyone! I've installed a new Wordpress platform on my server two weeks ago, and have been trying to get WP-Prettyphoto working since then. The strange thing is that it was actually working when I first installed it, and it broke somehow. From other posts I've been seeing, it seems I'm not the only one having this problem, although there also seem to be a lot of people who can use the plugin on WP 2.9.1

The problem I'm seeing is that Wordpress is following the links normally instead of showing the overlay box, disregarding the rel="prettyphoto" attribute. The plugin does seem to be working normally, as all scripts are loaded in the header and the rel attributes are in place. I've also downloaded the latest version (2.5.6) and overwritten the original jquery.prettyphoto.js, but had no luck with that either. As I'm running out of options here, I decided to post a plea for help: If you need any further information, please let me know.

By the way, the problem started when I was trying to set the width and height of a video in a post (I used the ? followed by width and height). I'm not sure if that has to do with anything (I actually deleted and reinstalled the plugin several times since then), but it was working fine up to that point.

I understand my indications might be a pretty vague, but I'm not much a programmer... Any help will be greatly appreciated!
Nico