It's turned on, it's set on 'left' to show up.
It sounds like you've installed module but not component
You need:
1. Download and install JComments component 2.2.0.2
2. Go to JComments settings and select categories where comments would be enabled. Also you could adjust permissions for all usergroups you've on site. For example you could enable/disable autopublishing (it allows to publish guests' comments without administrator's approve).
3. Save settings
If you're need to show latest comments list you're need must download, install, setup and publish JComments Latest module.
pls forgive me my english! That's a foreign language for me:)
For me too because I'm russuan
