I was using one of the popular Adsense modules to populate my sites with Adsense adverts and it struck me that many of my sites just were not making ANY money (I know, I should have picked it up earlier).

Now, the past few days I went a-vestigating to try and figure out why - and this is what I found.

When Adsense changes to the ad units in addition to the channels I continued to use my Adsense module, which worked well with the old channels, and everything seemed fine; the advert still showed on my sites and people could click through and all that.

But!

The impressions and clickthrough were not passed on to Adsense - don't ask me why, I'm not a programmer.

So, today I recode a few of my sites with the straight Adsense code and ... immediately I started to get impressions and click throughs.

Now I'm busy recoding about 80 web sites because I don't know which module to trust, except for Joomla! 1.5 there is Phoca - Google AdSense Easy, where you past in the straight Adsense code; no form to fill in and stuff and I can assure you, the impressions and click trough are registered.

If you are using one of the Adsense modules, check and make sure you are getting the credit.