Affiliate Marketing Secrets

My pages in http://www.frostquest.com experienced the drop in page rank last march 7, 2013
(or technically at end of the pile, even the spam sites has higher rank than I have when I search “www.frostquest.com”)
For example http://www.frostquest.com/contact.php can still shown at top, but game review pages like http://www.frostquest.com/free-download/… will displayed at bottom of search.
Frostquest is my game review web site where users can share the youtube videos and game reviews through the site, (include link to the sites that provides the download link)
I don’t really know what it caused it, I just listed the possible factors here, so please help me find the cause and get my site rank back.
1) I have added the text affiliate links in iframe.
2) Google fetched iframes, reserved only for ads, even it is only loaded when Java Script is active.
3) I have added the random game suggestion links at free banner space.
4) Comment feature has been spammed. (but I remove it regularly)
5) Comment feature use Java Script for dynamic images, which caused my site to drop traffic before (and I don’t know why)
6) I have opened exchange link for ads service, but I got no response and removed it from site yesterday.
7) Google returns me wrongly fetched meta tags at webmaster tools, e.g. Google reported me the meta duplication warning, so I have updated the pages, but Google still reports it. (But search shows correct meta)
I really need quick response, thanks everyone in advance!