ptrack module is not initialized

[strafer]

I built vanilla postgres and ptrack module following your instruction from readme. Then I added
shared_preload_libraries = 'ptrack'
in postgresql.conf

But when I query
CREATE EXTENSION ptrack;
postgres says me
ptrack module must be initialized by Postmaster. Put the following line to configuration file: shared_preload_libraries='ptrack'
and that's all. There is no any other error or warning in postgres log too.

I'm confused a littile.

[strafer]

Nevermind, there was unseen another shared_preload_libraries instruction below in config file, and it silently overrode new one. Sorry for the the trouble.