Well, I think that you may be adding this the wrong way. But, to make it work how it is now, add this to httpd.conf (your apache configuration file):
Code:
<VirtualHost 69.93.230.98>
ServerName christina.hardcork.com
DocumentRoot /home/christina/public_html
</VirtualHost>
assuming of course, that /home/christina/public_html is where you want her doc root to be.
Although, when I do an account add such as this, I just use the cPanel Web Hosting Manager, select -add account- and input the info. (in your case, the domain name would be christina.hardcork.com) and this makes WHM do all the hard work for you such as making the home directory, ftp account, httpd.conf entries, etc. etc. etc. Or, did you do it this way and still ended up with this error?
Let me know if you need any other assistance, be it here or via email. If you find that you cannot fix this, I can jump in there and take a look. Good luck!