2011-03-07, 12:03 PM
Alright so after some researching I found out the problem is on the actual XML output by Stop Forum Spam website so there isn't much you can do besides placing a @ before simplexml_load_file(...), it's the actual site that outputs invalid XML so you can't do anything.
All my plugins are available for free at MyBB Extend and on my GitHub. MyBB-Plugins.com has been closed and none of my plugins are officially maintained or supported.