Can someone help me with this Facebook module error????

Hey guys,

I have two questions for my Drupal website http://nova.meetuon.com -- which is for models and other talent to join and upload their pictures, bios, etc. -- that I hope one of you astute gentlemen or ladies can help me with:

1) I am trying to get the Facebook module to work! It allows people to link their Facebook login and user IDs with the website. I've done everything that they say on the Drupal.org thread ( http://drupal.org/node/158088 ) ... but when I do, I get this error:

Fatal error: main() [function.require]: Failed opening required 'simplexml44-0_4_4/class/IsterXmlSimpleXMLImpl.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/meetuonc/public_html/nova/modules/facebook_auth/facebook-platform/php4client/facebookapi_php4_restlib.php on line 34

What does this mean, and how do I fix it?

2) Does anyone know a module, or a way otherwise, to display new members' pictures on the front page of my site? I want it to display 4 or 5 of the newest members' pictures, and allow users to click on the photos and view the entire member's profile. See http://blackplanet.com for an example of what I'd like to do.

Any help on these issues would be GREATLY appreciated!