I think your CTR is good. It's better than mine Bid on click is variety from keywords to IP so you will earn from $0.01 to $10 whatever
The best way to improve your CTR is through ad positioning. This is what I did: How I increased my CTR by 800% hope it helps.
First, understand who is likely to buy your product. Second, you need to know what your target audience does online and what ad approaches appeal to them. The Internet has tremendous potential to improve targeting through technology. But in the meantime, remember the basics.
dude.. first of all.. get a good template and second of all, provide less ads and more content then ull get more returning visitors.
Check my previous thread on dp. The positioning and the color of your ads is very important. Try choosing 000080 as link color - definitely a good tip to get an higher CTR. Also - if you are running a forum - don't expect too much. Forums always have a low CTR. In general - always use large rectangles - they get most clicks and you the most money.
change your ads link color to red..and also place your ads in a good position. you may want to xperiment it the placement..