> Tue Sep 28 13:41:15 2010 : Error: Failed binding to authentication address * port 1812: Address already in use
> Tue Sep 28 13:41:15 2010 : Error: /usr/local/etc/raddb/radiusd.conf[240]: Error binding to port for 0.0.0.0 port 1812

The error means a process is already bound to port 1812.  Did you stop the service before trying to run it in debug mode?