That’s strange: I did that, and it still wasn’t working. Then I opened wp-cache-config.php file and changed $sem_id value to a random one… the plugin panel now reports WP-Cache is caching some pages. I guess that’s better than before, but still … but still Superacache isn’t caching. Is this simply a coincidence?
I’m having your very same problem 😐 WP Super Cache isn’t caching at all on my web site (a2p.it), even if I get a lot of page views 😐