How can I make Zeitgeist index the content of my files?

I'd like to be able to perform a fulltext search in the Dash or in Synapse.

Installed zeitgeist-extension-fts, restarted the system, opened and closed a few OpenDocument text files -- but neither the Dash nor Synapse know any of the words inside these files.

Code:
$ pgrep -l zeit
3866 zeitgeist-daemo
3872 zeitgeist-fts
3874 zeitgeist-datah