I have checked libao installed on my sysmem (rpm -qa libao) and it seems I have libao-0.8.5-2 installed. Maybe this is a too new version, because I can't find any newer one, so I will uninstall the actual version I have and will reinstall an older one... for example libao-0.8.3-alt2.src.rpm
Hope it works?
You need libao-devel as well as libao. Try the standard Fedora packages before anything else.
Paul.