adserver.inc failed to load when clear cache

The same thing is happening to me on my site.

Also having trouble when clearing cache. Haven't got ads to display yet

* Ad module failed to access cache sites/default/files/.1.ad.cache. Verify file permissions.
* Ad module failed to access cache sites/default/files/.2.ad.cache. Verify file permissions.
* Ad module failed to access cache sites/default/files/.3.ad.cache. Verify file permissions.
* Ad module file-cached data has been flushed to the database.

for #2: remove these files and let the module create new cache (by flushing cache or running cron)

I've tried this...and it didnt work. I even removed the module and still nothing. I am still getting: "Access denied" on all pages, despite the permissions being on top

Needs review is used when patches are posted.

Drupal 6 is EOL and no longer supported. Closing this as outdated for that reason. Thanks for your contribution!