Comment/Like actions on Facebook feed post

I am able to post a message to my facebook contact's feed using graph api, but what I observe is that the usual options to like those posts or to comment on them don't show up.

For example, say my application posts for FB user A on to the feed of FB user B, and I am a common c开发者_如何学运维ontact, then I see the feed, but I don't have the options to like or comment on that feed post.

Is there any configuration to enable those options for feed posts?

Are you sure that user B's privacy settings allow comments and likes to be made on Posts which are on their wall? If you are, please clarify what you're posting, are you able to like/comment on the same content if it's posted to your own wall?