Can't get it to work on domain/blog; no CSS from CDN

I’ve had to disable it. I’ve spent all evening trying to get it working… after a successful install on another blog site.

The plugin creates a blog subdirectory in wp-content, and the css goes missing.
If I leave the permissions open in the htaccess, it trashes my redirect.

I have to have:
RedirectMatch 301 ^/blog/index.php/([^/]+)/$ http://jonburr.com/blog/$1

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

for my pretty permalinks to work. How do I set the options in the CDN tab to accommodate this configuration

http://wordpress.org/extend/plugins/w3-total-cache/