afp and external drive

Hi I am new to this. I have original Apple TV. I have installed latest ATV Flash software then ran SmartInstaller as instructed. Some things seem to be working but I can’t see attached external drive and can’t access shared drives on network although Apple TV can see them. It says apple file server missing and Smart Installer with a 1.0 dmg in ~/documents will fix issue.

I have no idea how to do this and was really hoping to avoid terminal etc as I thought this was whole point of ATVFlash update to make everything easy. Is this connected to why I also cant see attached drive. Any help would be most welcome.