Mini6410 dhcp not working

CBoIT
Hi everybody,
I have a Mini6410 with working Ubuntu from SD (just running from SD - not
installed). The version is the latest image released, found on this Forum.
Ubuntu runs fine, but I'm not able to make eth0 working. What I did is to
install the deb package of network-manager, with dependences, but no news.
Then I tried to modify the /etc/network/interfaces file with 
########
auto eth0
iface eth0 inet dhcp
########
but I got this error:
socket: Address family not supported by protocol - make sure CONFIG_PACKET
(Packet socket) and CONFIG_FILTER (Socket filtering) are enabled in your
kernel configuration!
Failed to bring up eth0

Any ideas, please?
Thanks
Regards

CBoIT
Any help?
Thanks