Failed to run Freeradius on CentoS

[Bhanu Vegesna]

listen {
	type = "auth"
	ipaddr = 127.0.0.0
	port = 1812
Failed binding to authentication address 127.0.0.0 port 1812 as server
inner-tunnel: Address already in use
/usr/local/etc/raddb/sites-enabled/inner-tunnel[32]: Error binding to
port for 127.0.0.0 port 1812


I tried to check if duplicate version of freeradius and changing  to
use specifc ip no luck.

Can any throw some light and help me out ?

regards
Bhanu