Ipod touch game apps won't post to facebook newsfeed?

I have a few games on my ipod touch and i'd like to share my scores with friends on facebook. The problem though is that it will only post to my profile wall and not the live newsfeed. Why is this? I tried to find the 'iphone for facebook' app on the facebook app settings but it's not there. I can post normal status updates fine. Is there anyway I can fix this?