Your description looks

mfoss — Tue, 16 Apr 2013 18:33:08 +0000

Your description looks correct. I tried it, and works for me: in ejabberd.log I see a line:

=INFO REPORT==== 2013-04-16 20:30:47 ===
I(<0.39.0>:mod_write_module:11) : Loading module 'mod_hello'

When you add your module to ejabberd.cfg, and you start ejabberd, see if there is any new message (maybe some error report?).

ejabberd - Comments for "can&#039;t write into log file"