Unable to install iPhoto on my osX Lion. No Updates either.

I am unable to find my iPhoto installation. I did an OS re-install some time back, but I don't remember if the iPhoto was missing prior to the install. Also, the App Store shows me the Accept button on the tool and when I click on it, there is a message saying, Future Versions of the Software are Available through Update.

Any Idea what this is about, and how can I get back iPhoto on my device.

thanks.