Error in installing 3.7

[NDT_69]

I wanted to install the french version of knoppix onto my hd
so i wrote
boot: knoppix26 2 lang=fr
it worked perfectectly.

on a console, i put:
$ IGNORE_CHECK=1 knoppix-installer
and configure and write configuration
it worked

i modified .knofig:
SYSTEM_TYPE="beginner"
HD_MODULE="configured"
HD_FORMAT="yes"
HD_FSTYPE="ext3"
HD_CHOICE="/dev/hda6"
HD_MAP="/dev/hda1:/boot /dev/hda7:/home"
HD_IGNORECHECK="no"
SWAP_MODULE="configured"
SWAP_AUTODETECT="yes"
SWAP_CHOICES=""
NAME_MODULE="configured"
NAME_NAME="xxx"
USER_MODULE="configured"
USER_NAME="xxx"
USERPASS_MODULE="configured"
USERPASS_CRYPT="xxx"
ROOTPASS_MODULE="configured"
ROOTPASS_CRYPT="xxx"
HOST_MODULE="configured"
HOST_NAME="xxx"
SERVICES_MODULE="configured"
SERVICES_START="kdm ssh samba"
BOOT_MODULE="configured"
BOOT_LOADER="lilo"
BOOT_DISK="no"
BOOT_WHERE="mbr"
INSTALL_READY="yes"

I re-do a knoppix-installer
and it begins to install
at 80% of completion, problems.................................

a lot of cp problems with i/o errors

I verified memory with knoppix memtest
I verified hd with construtor's utilities
I verified the checksums with md5sums
all work well!

the same problem appeared with english language (boot: knoppix26 2)
i didn't test with german because i'm not good with it.
the same problem without dma (boot: knoppix26 2 nodma lang=fr)
and in graphical mode (boot: knoppix26 lang=fr)
and with 2.4 kernel (boot: knoppix 2 lang=fr)

any idea?