I see you have the cache installed but its not doing a single thing that it claims to do:
<!-- Performance optimized by W3 Total Cache. Learn more: http://www.w3-edge.com/wordpress-plugins/
Minified using disk: basic
Page Caching using disk: enhanced
Database Caching 17/23 queries in 0.017 seconds using disk: basic
Object Caching 7397/7825 objects using disk: basic
Content Delivery Network via N/A
Served from: http://www.poss.asia @ 2012-09-10 08:22:13 -->
It's not minifying, pages are not caches, and neither are images, css, or js. Also you are not letting browsers to cache your page' nor compress anything.
However all this is nothing compared to the 3-4 seconds it takes for your server to answer. You either have a misconfigured server, your bandwidth is tiny, or you are using a plugin which is trying to connect to a file elsewhere that doesn't exist. It takes 15 seconds for your page to load with 1.7 megs of info when it should be 3 seconds maximum.
Please go to http://www.webpagetest.org/forums/forumdisplay.php?fid=4&page=4 this forum, and show them your test results (http://www.webpagetest.org/result/120910_WJ_2a710c81c423e1855794e012712284b0/) and tell them that 'you have 3341ms Time to First Byte.'
Also you can download this report about your website, and what you can do *after* you fix Time to First Byte... how to make it faster (free), here is a direct link to the report http://gtmetrix.com/reports/www.poss.asia/2AczKdOy/pdf
On a different note, you are running multiple copies of an identical website on different domains, and google gets unhappy when it finds duplicate content (http://www.possmma.us/ = http://www.poss.asia/), and may think you are trying to spam them.
This is outside the scope of the support team so I unfortunately I can't help configure the plugin.