configuring Apache on Mountain Lion proxying to Node.js

I'm trying to get Apache on OSX 10.8.2 to proxy requests to a specific URL to a Node.js server running on port 8080 following this guide: http://garrows.com/?p=455
In order to do this, I add the following to apache2/users/george.conf:

ProxyRequests Off
ProxyPass /foo http://localhost:8080
ProxyPassReverse /foo http://localhost:8080

But with this added, apache wont start. In fact, as soon as I add even the 'ProxyRequests Off' directive, apache will no longer start. Is this the right place for this directive?

This works for me (I use port 3000 to connect to my own server here):

<Directory "/Users/psq/Sites/">
    Options Indexes MultiViews
    AllowOverride None
    Order allow,deny
    Allow from all

</Directory>

ProxyRequests Off
ProxyPass /foo http://localhost:3000
ProxyPassReverse /foo http://localhost:3000

But does not work if you place it inside <Directory>.

To debug, you can run:

sudo apachectl configtest

This will tell you where there is an error in your config.