KKM, I located your blog from your signature and took a look at it. I see you are using AdSense.
I also noticed that your site states are available for the public. You are only getting about 5 visitors to your blog a day. The first thing you need to do is to increase your traffic. You need traffic in order to convert any advertising. In addition, there are some who have certain traffic requirements before they will accept you into their program.
Take a look at this thread which will help you find many ways to increase your blog traffic
21 Ways to Increase Blog Traffic