Locales problem on Debian @ Kirkwood (5 replies)

Hi guys,
since few days ago I have some problems with my installation of Debian on NSA325.
When I log in as root through ssh I obtain:

krono@ZION-NAS:~$ su
Password:
configuration error - unknown item '�B'h�m6i'Lm�if?&a�z�' (notify administrator)
configuration error - unknown item '�?�S' (notify administrator)
configuration error - unknown item '�' (notify administrator)
configuration error - unknown item '*'' (notify administrator)
configuration error - unknown item 'C�QO�?IR�"d�!' (notify administrator)
configuration error - unknown item '�' (notify administrator)
configuration error - unknown item '�3'8' (notify administrator)
configuration error - unknown item '�c�;�Gx�R,U%x/G�K�F%jt*weQcd;Ro�|' (notify administrator)
configuration error - unknown item 'c<LO�[l�?]d�^g�?"}F�!K�' (notify administrator)
configuration error - unknown item 'wu�/Yn�7�+p-�"�|Exo?�L' (notify administrator)
configuration error - unknown item 's?�(C}pnE,4�n�}`y�?9F0nA�9�%�d�r�?1�-"\�A�!d1btS�c�i~H0,a�?@�?d�}�!;c�<�q.`H�t`'';`r�' (notify administrator)
configuration error - unknown item '�h�n0DmT�o!�
                                                �Fa�e6�8Ech#l' (notify administrator)
configuration error - unknown item '�x�GoL]�M?�v)'�t�h,�#�]b�$;F#�jRO�ByBd?*' (notify administrator)

I understood that it could be a charset problem then:

root@ZION-NAS:/home/krono# locale
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=C
LANGUAGE=
LC_CTYPE="C"
LC_NUMERIC=it_IT.UTF-8
LC_TIME=it_IT.UTF-8
LC_COLLATE="C"
LC_MONETARY=it_IT.UTF-8
LC_MESSAGES="C"
LC_PAPER=it_IT.UTF-8
LC_NAME="C"
LC_ADDRESS="C"
LC_TELEPHONE="C"
LC_MEASUREMENT=it_IT.UTF-8
LC_IDENTIFICATION="C"
LC_ALL=

and when I run dpkg-reconfigure:

root@ZION-NAS:/home/krono# dpkg-reconfigure locale
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LC_MEASUREMENT = "it_IT.UTF-8",
	LC_PAPER = "it_IT.UTF-8",
	LC_MONETARY = "it_IT.UTF-8",
	LC_NUMERIC = "it_IT.UTF-8",
	LC_TIME = "it_IT.UTF-8",
	LANG = "C"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_ALL to default locale: No such file or directory
dpkg-query: package 'locale' is not installed and no information is available
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.
/usr/sbin/dpkg-reconfigure: locale is not installed

What's happening?
Thanks so much!

Ivan