I had this problem for sometime and tried almost everything to get Adsense to show on my Blogger and my Website nothing seemed to work, turns out it was a simple fix.
Here's what I did:
If you are running Windows, you will want to Explore c:/windows/system32/drivers/etc
find the file named "HOST" and right click it and select open, use Notepad to view it.
Now what you want to do is hold CTRL and hit F and find the word "Google".
Delete everything with the word Google in it, keep clicking the find next button in the find window.
When you have finished deleting all the entries you want to save the file. Once the file is saved right click on it and go to properties and select the Read Only box.

Check your Blog or Web Site and you should see your Adsense Ads.
Hope this helped ;)

Posted in Labels: cant see ads, cant see adsense