Well what is happening is the following. The person who wrote the tutorial forgot one thing.
I have modified the tutorial but I at this point I don't know how to replace the included download files.
When following this HowTo, I encountered these problems:
$post['content'] = JRequest::getVar('content', , 'post', 'string', JREQUEST_ALLOWRAW);
Munchkin 07:25, 2 September 2011 (CDT)