As version 2.0 is currently a beta version, and not going to be released until after WordPress 3.0 is released, let's keep the beta version support private using e-mail and/or skype rather than this public forum. I'd hate for others to become confused about functionality not yet present in their version.
Make sure that you have, at least, the default category selected in the banner management page. Scheduled ads will only appear on those posts with the selected categories.
I haven't heard of this error before. But, I'll be glad to help isolate the problem. Email/skype me with a temporary login and I'll take a look.
I've just tested something and I see that it works where the article posts have not been categorized, but does not work where articles are categorized. Hmm
I'm experiencing a similar problem, whereby the ads show in the header on static pages, but not on article post pages. I'm not sure why this happens, as both static and articles obviously use the same header file where the banner code has been inserted. I tried inserting the ob_start(); code but that doesn't seem to help.
I suspect this is a buffering issue, in that the regular post page has completed prior to ads being returned from the database query. I have taken another look at the code and have a possible solution. Please try the following modification.
In the cd_ad_functions.php file, insert the following on Line 7:
ob_start();
Please let me know if you continue to experience this issue.
At times, I see lag time for ads showing up on my blog PacificFlyer.com.
Sometimes only the default banners show and then upon a page refresh, the correct ones display. I don't know if this is an issue with my host or something in the AdSponsor plugin.
Thanks for the great plugin. Excellent support and documentation!