Ive gone from a static html page with a few ads on it to a wordpress blog. From about 1000 visits i would get around 5-15 clicks a day on the static page. I switched to the wordpress format 2 weeks ago and have only gotten 1 click thus far.

Can anyone recommend anything to improve the ctr? Or do you think it will correct itself overtime?

I would imagine that this will sort itself out in time! when you make major changes it can take the search engines several weeks to sort it out. As i dont know what sources your traffic comes from i cant offer more help at this time.i wouldnt worry about clickthrough rate for now as it varies with time. the other possibility is that the ads being shown are not as relevant to your users as they used to be which could be down to installing wordpress.

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yes it's could happens when you made changes in your sites your adsense CTR may be increasing or may be decreasing.
but after some time you can be in the normal situations.

thanks for the help guys and you were right i am at about the same earnings now as i had prior to the change