"Cannot assign requested address" Error starting FreeRadius

[Paul Heil]

I have a GuruPlug Server 003-GP0001 running Debian Linux 6.0.3 with
FreeRadius 2.1.10 installed.

I have followed the Basic Configuration
HOWTO<http://wiki.freeradius.org/Basic-configuration-HOWTO>,
but when I get to the point of starting the server for the first time, I
get this error:

    Fri Nov 11 18:31:49 2011 : Info: Loaded virtual server inner-tunnel
    Fri Nov 11 18:31:49 2011 : Info: Loaded virtual server <default>
    Fri Nov 11 18:31:49 2011 : Error: Failed binding to authentication
address 127.0.0.1 port 18120 as server inner-tunnel: Cannot assign
requested address
    Fri Nov 11 18:31:49 2011 : Error: /etc/freeradius/sites-enabled/
inner-tunnel[32]: Error binding to port for 127.0.0.1 port 18120

Can anybody suggest how to fix this issue?

The complete output from the freeradius -X command is available:
http://pastebin.com/cX3ti0wk

Thanks,
PaulH
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