HOSTING CACHED SITE ON AMAZON S3

Hi
I have a wp instance running on domain origin.sitename.com and I’m trying to setup the w3tc plugin to host the cache on amazon S3 which will get an alias of http://www.sitename.com. I’m also using cloudfront as a cdn.sitename.com. Cdn is working fine but the cache on s3 is not..

Can someone help me figure out the settings please?

http://wordpress.org/support/plugin/w3-total-cache

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