See... https://moodle.org/mod/forum/discuss.php?d=322224
You have asked about Moss several times. The plugin is for an older version of Moodle and even then was not for production use. It doesn't matter how many times you ask, that's not going to change.
You should ask the Moss people what their intentions are - or find a developer who can take on this plugin and update it.
Short answer - it doesn't work