ATT wireless a no-go

[Ed Jabbour]

I just had AT&T Uverse service installed, replacing Comcast cable.  The
desktop, running Debian etch, performs with an ethernet connection, but I
can't get wireless going on a  laptop, IBM T30, also etch. 

The card is recognized:
        dmesg|grep wlan0:
        wlan0: vendor: 'NETGEAR WG511 54 Mbps Wireless PC Card'
        wlan0: ethernet device [MAC addreess] using NDIS driver
         netwg511 . . .

/etc/network/interfaces:
        iface wlan0 inet dhcp
                wireless-essid 2wire341
                wireless-mode managed
                wireless key ******

iwlist s finds 3 ssid, including mine.  (How does iwlist find anything with
no connection?)

Running /etc/init.d/networking restart, I see:
        DHCPRELEASE on wlan0 to 192.168.1.1 port 67
        send_packet: Network is unreachable

192.168.1.1 was the IP of the old router I had, now disconnected.  The
ATT "RG" - the router -  is 192.168.1.254.  I
haven't a clue where that wrong IP is coming from:
        grep -r 192.168.1.1 /etc
        /etc/ppp/options:# ms-dns 192.168.1.1

route -n comes up blank, of course.  route -n on the desktop gives
192.168.15.0 as the Destination.  I think the ATT system is DSL.  Win2k
connects with no problems, as does the lap when connected with cat5.  

Any hints, answers, pointers, etc. greatly appreciated.  Thanks.