thetechchef on "preview_nonce causing "You do not have permission to preview drafts.""

On my clients page http://www.orwit.org/ I am having some trouble with the page previews giving me an error that says

You do not have permission to preview drafts.

I have looked through the forums and tried

1. Clearing my cache
2. Updating my htaccess
3. Checking the general settings

I can't change the general settings because of our host setup. It's installed to http://s470966220.onlinehome.us/wp-orwit on the host. The domain name points to that folder, and I have updated the wpconfig (Note I did add code to wpconfig to allow larger file uploads.)

.htaccess looks like this

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress

Please help me fix this error, this is my last step before turning the site over to the clients.