The first thing I notice is that you only have five hubs, and some of them are a little difficult for native US/UK English speakers to read, which are the bulk of your incoming Hubpages traffic.
The second thing I notice, is what exactly are people prepared to buy from Amazon when they reach one of your hubs? The only one that's really focused on a product (registry cleaners) is a product that most people will buy online in downloadable form from sites they use for other software products (i.e. download.com), or at very least will likely leave your page to go searching for a free trial to use first. Either way, you don't get commissions for it.
Think from the perspective of your traffic -- what are they looking for when they get to your article? If it's a product-based article about things that are readily available on Amazon, then likely the people who will find your article are researching something that they're trying to decide whether to buy or not. If it's an article about SEO, they're probably going to get there by looking for free information on how to optimize their own articles or sites, and not be planning to buy anything.
Do some research, work on tailoring to the kind of people you want to attract, and keep working on it...there's almost nothing you can tell from only five hubs, especially if you've never really done affiliate writing or internet marketing before.