remains published

Do you have debugging enabled? It’s under the “Diagnostics” link on the settings page. If so, does it show any errors?

thanks for reply
I do not think there are errors

656 -> SCHEDULED at Thu, 05 Dec 2013 14:02:00 +0000 (1386252120) with options Array ( [expireType] => draft [id] => 656 )

clear, however, that I do not have much experience with wp I’ve always used other cms

I am also having this issue. I attempted to test this plugin on my dev environment yesterday but to no avail. I set some expiration’s of posts all of which did not set said posts to ‘draft’.

2013-12-04 16:35:27	36 -> SCHEDULED at Thu, 05 Dec 2013 00:40:00 +0000 (1386204000) with options Array ( [expireType] => draft [id] => 36 )
2013-12-04 16:35:27	36 -> UNSCHEDULED
2013-12-04 16:30:54	36 -> SCHEDULED at Thu, 05 Dec 2013 00:32:00 +0000 (1386203520) with options Array ( [expireType] => draft [id] => 36 )
2013-12-04 16:30:54	36 -> UNSCHEDULED
2013-12-04 16:30:28	36 -> SCHEDULED at Thu, 05 Dec 2013 00:30:00 +0000 (1386203400) with options Array ( [expireType] => draft [id] => 36 )
2013-12-04 16:30:27	36 -> UNSCHEDULED
2013-12-04 16:29:01	36 -> SCHEDULED at Wed, 04 Dec 2013 22:30:00 +0000 (1386196200) with options Array ( [expireType] => draft [id] => 36 )
2013-12-04 16:29:01	36 -> UNSCHEDULED

Edit: My testing servers are xampp and linux (I tested on both and received the same result). WordPress and plugins: manual installation.

I would contact the plugin’s author for support on this. It seems like there are some issues they need to address.
I installed this plugin on a test development site, with a bunch of diagnostic error checking installed. After installing Post Expirator, there were many errors and warnings that showed up.
I think the support needed is beyond the scope of this forum, so contacting the developer may be the best bet.