Help with Spam reporting

[arthur ema]

I created the file backends.local.php with the following contents. When logging in, I see no additional option to report mail as spam. How do I enable reporting?

<?php
$conf['spam']['reporting'] = true;
$conf['spam']['spamfolder'] = Spam;
$conf['notspam']['reporting'] = true;
$conf['notspam']['spamfolder'] = Inbox;
$conf['spam']['program'] = '/usr/bin/spamc -C report -u %l';
$conf['notspam']['program'] = '/usr/bin/spamc -C revoke -u %l';

[arthur ema]

Horde version 5.2.12
Imp version 6.2.16

[arthur ema]

I replaced all the contents in backends.local.php with the example shown in this thread and I have spam reporting buttons
https://lists.horde.org/archives/horde/Week-of-Mon-20150216/053728.html