On a PC normally driven bu Debian etch, knoppix 5.0.1 from CD detects card reader

Bus 001 Device 002: ID 0dda:2005 Integrated Circuit Solution, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0dda Integrated Circuit Solution, Inc.
idProduct 0x2005
bcdDevice 1.6b
iManufacturer 1 ICSI
etc

$ dmesg | grep sd
detected as sda

It is not mounted by launching knoppix from CD with card reader inseeterd.

Trying to mount it like in Debian
mnt#mkdir flash
#mount -t vfat /dev/sda1 /mnt/flash
device sda1 does not exist

#mount -t vfat /dev/sda /mnt/flash (which is wrong per se)
no medium found

before going to buy an expensive 9GB flash card I would like to be able to mount this card reader (Sony card memStick)

Thanks for help
francesco pietra