Wireless chipset Libertas 88w8335 does not show up on Debian Lenny, Issue with wireless card with old Marvell Libertas 88w8335 chipset Options

[NiceLittleRabbit]

Hello,

I have just installed Debian Lenny on my computer and a 'lspci' showed:

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01:01.0 Ethernet controller: Marvell Technology Group Ltd. 88w8335 [Libertas] 802.11b/g Wireless (rev 03)

So I went ahead and installed 'libertas-firmware' and 'wireless-tools'

I updated /etc/network/interfaces adding:

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# The wireless network interface
auto wlan0
iface wlan0 inet dhcp
wireless-essid homewlan
wireless-key 1234567890ABCDEF
wireless-mode managed

I see the correct modules loaded:

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libertas_sdio           7528  0
mmc_core               39964  1 libertas_sdio
libertas_cs             6592  0
libertas               63464  3 usb8xxx,libertas_sdio,libertas_cs
pcmcia                 29548  1 libertas_cs
firmware_class          6816  4 usb8xxx,libertas_sdio,libertas_cs,pcmcia
pcmcia_core            31892  2 libertas_cs,pcmcia

However, when I type 'iwconfig' I get:

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lo        no wireless extensions.

eth0      no wireless extensions.

And there's no way to get wlan0 up and running (even recognized by Debian):

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Debian:/home/NiceLittleRabbit# ifup wlan0
Error for wireless request "Set Mode" (8B06) :
    SET failed on device wlan0; No such device.
Error for wireless request "Set Encode" (8B2A) :
    SET failed on device wlan0; No such device.
Error for wireless request "Set ESSID" (8B1A) :
    SET failed on device wlan0; No such device.
Internet Systems Consortium DHCP Client V3.1.1
Copyright 2004-2008 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

SIOCSIFADDR: No such device
wlan0: ERROR while getting interface flags: No such device
wlan0: ERROR while getting interface flags: No such device
Bind socket to interface: No such device
Failed to bring up wlan0.

Could you please help?

Thank you in advance