adsense code not working in drupal 7
full html isn't always enough to provide the necessary access.  go to /admin/config/content/formats and create a new format (I call mine 'Unaltered') with the following setup (make sure to restrict it to admin ONLY):

This will allow you to perform inline js, etc within a block, without requiring a new module. Also, make sure the style listed in the js you include matches the size of the block (or more accurately, that the block matches the size of ad you want to show), or you will have strange layouts where the ad doesn't fit the container.