Failed to open socket

I recently upgraded to 2.0.4, and now I'm seeing the following error when I start FreeRADIUS: radiusd -X: /opt/freeradius-2.0.4/etc/raddb/radiusd.conf[210]: Error binding to port for 0.0.0.0 port 1812 radius.log: Sat May 3 20:21:39 2008 : Error: ERROR: Failed to open socket: Sat May 3 20:21:39 2008 : Error: /opt/freeradius-2.0.4/etc/raddb/radiusd.conf[210]: Error binding to port for 0.0.0.0 port 1812 Sun May 4 01:37:24 2008 : Info: Ready to process requests. I tried hardcoding the IP & Port in radiusd.conf, but it didn't make any difference. I reviewed posts to this list and found others have seen similar errors, but their fixes didn't apply to my situation. Any suggestinons? Thanks!