The problem is most likely that you are behind a proxy server. You will need to modify /usr/local/aolserver/modules/tcl/http.tcl.
In http.tcl, search for:
set fds [ns_sockopen -nonblock $host $port]
and replace it with:
set fds [ns_sockopen -nonblock www-cache.usyd.edu.au 8080]
set uri http://$host$uri
