Shoutbox

Actually, this should be in the scripting section of the forum, so he was correct, although it was an unnecessary post.  The correct action would have been to simple 'Report' the post and a moderator would have dealt with it

As for the original problem, did the script install properly?

If you go to Plus Preferences & Options and click the scripts tab, does the script list as running?

If so, then try unchecking the box, clicking apply, restarting messenger and then going back into options and re-checking the box and clicking apply.

Failing this, uninstall and re-install the script