This is from Google take note of the last bit of info To verify that your AdSense code has been properly implemented, first, open your site in a browser and view the source code (select 'View' then 'Source' or 'Page Source'). Next, compare the AdSense code in your page source with the code from your AdSense account. Your ads may not appear if you see any of these issues: The AdSense code does not appear in its entiretyThe code displays all on one lineThe code has extra HTML tags within it