Lost wireless after Hoary upgrade

[Florence Berbain]

Hi,

I just upgraded from Warty to Hoary on my laptop. It went alright, 
except I lost the wireless interface along the way. Does anybody know 
what I'm supposed to do to get it back? Here's the data I have:

adele at Marlon:/etc/network $ lspci
0000:02:02.0 Network controller: Intel Corp. PRO/Wireless LAN 2100 3B 
Mini PCI Adapter (rev 04)

adele at Marlon:/etc/network $ lsmod | grep 2100
ipw2100                98788  0
firmware_class         10016  1 ipw2100
ieee80211              23524  1 ipw2100

adele at Marlon:/etc/network $ iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

sit0      no wireless extensions.

The config file is still the same as in Warty:
adele at Marlon:/etc/network $ cat interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
        # wireless-* options are implemented by the wireless-tools package

iface eth0 inet dhcp
name Ethernet LAN card

iface eth1 inet dhcp
name Wireless LAN card
wireless_essid ****my_network_ssid****
wireless_key ****my_key****

#auto eth1


The wireless interface used to be called eth1 on Warty, but of course 
here there is no such interface:
adele at Marlon:/etc/network $ sudo ifup eth1
Error for wireless request "Set Mode" (8B06) :
    SET failed on device eth1 ; No such device.
Error for wireless request "Set Encode" (8B2A) :
    SET failed on device eth1 ; No such device.
Error for wireless request "Set ESSID" (8B1A) :
    SET failed on device eth1 ; No such device.
Internet Systems Consortium DHCP Client V3.0.1
Copyright 2004 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/products/DHCP

sit0: unknown hardware address type 776
SIOCSIFADDR: No such device
eth1: ERROR while getting interface flags: No such device
eth1: ERROR while getting interface flags: No such device
sit0: unknown hardware address type 776
Bind socket to interface: No such device
Failed to bring up eth1.

There was a post from Don Jenkins 2 weeks ago with a similar problem, 
but no solution that I could find. Thanks for any suggestions,

Florence