Collaboration tools

We are running EP6 SP2 patch 3.

If I select the details option for a document in the portal KM repository, then the resultant pop-up window includes a Collaboration menu item that allows me to give feedback or write a review.

When I do the same for a document stored in a meeting room then I do not get the collaboration menu, and the other menu items also omit collaboration type options.

Is this by design, or are we missing something in our portal configuration?

Regards

Mike