AdSense adverts not displayed to logged in users in 4.7

Hello,

I am testing the AdSense module on two sites, one is Drupal 5.x and the other Drupal 4.7.x. The Drupal 5.x AdSense module is working great :) Adverts show whether I am logged out or in.

On 4.7.x I am having a small problem. When logged in users only see the blank box that says, "Google AdSense". When logged out adverts appear.

What am I overlooking? Thanks for your assistance :)

Ps- 5.x site is NextGenThinkTank.com and 4.7.x site is Tammysrecipes.com.