[kh99]

Well, if I view the html source of the page you linked to above, and search for 'data-zone="ron" data-format="300x250"', I find it once, but occasionally I'll find it twice. So it kind of seems to me like it might be working, but I don't see any ads at all on that page.

Edit: Also (possibly related), when I look at the JS console I see this:

[11:25:24.433] ReferenceError: GS_googleAddAdSenseService is not defined @ http://access-programmers.co.uk/forums/showthread.php?p=1301767&mode=linear#post1301767:59
[11:25:24.433] ReferenceError: GA_googleAddSlot is not defined @ http://access-programmers.co.uk/forums/showthread.php?p=1301767&mode=linear#post1301767:63
[11:25:24.433] ReferenceError: GA_googleFetchAds is not defined @ http://access-programmers.co.uk/forums/showthread.php?p=1301767&mode=linear#post1301767:72
[11:25:24.565] ReferenceError: GA_googleFillSlot is not defined @ http://access-programmers.co.uk/forums/showthread.php?p=1301767&mode=linear#post1301767:569
[11:25:24.572] ReferenceError: GA_googleFillSlot is not defined @ http://access-programmers.co.uk/forums/showthread.php?p=1301767&mode=linear#post1301767:906
[11:25:25.095] The Web Console logging API (console.log, console.info, console.warn, console.error) has been disabled by a script on this page.
[11:25:25.240] Use of attributes' nodeValue attribute is deprecated. Use value instead. @ http://cdn1.developermedia.com/a.min.js:1