[syslog-ng]bind_inet_socket() error

I'm getting the following error when attempting to start syslog-ng: # ./S74syslog start io.c: bind_inet_socket() bind failed 172.16.65.61:514 Cannot assign requested address Error initializing configuration, exiting. here is the line in the syslog-ng.conf file that is setting up a the corresponcidg source: source net_tcp { tcp( ip(172.16.65.61) port(514) ); }; Does anyone know what the error means and how I can get around it? I appreciate any help you can provide. Thanks!