lost internet access on only one connected laptop ?

Running home network with Win 7 Pro and XP Home Edition. Have one problem laptop that connects to/recognizes the wireless router...but can't connect to the internet ? Prior to changing the WEP key for the system...this laptop would connect ?

Have another laptop and a couple printers working fine on this wireless router (keys changed also on these)...but the Toshiba laptop will not go on-line ?

The only other thing that changed is the 2 desktops now have Win 7 Pro...the other laptop that's connecting is/was XP Home SP3 and the problem Laptop is/was also XP Home SP3. Have checked and double checked the key...it is correct and must be if the router recognizes the laptop in the router configuration/attached devices.

Please suggest what might be going on here...and how I can get the laptop re-connected to the Internet ?

On problem laptop...Network Connections shows a status of "Connected" as does the little network icon in system tray as long as I set the IP address manually on the this laptop (other 3 working PC's have auto configure)

Here's IPconfig /all on problem laptop with manual IP configuration:

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Tim>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : ROADWARRIOR
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Ethernet NIC
Physical Address. . . . . . . . . : 00-0F-B0-A3-28-5C

Ethernet adapter Wireless Network Connection:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/Wireless 2200BG Network Connection
Physical Address. . . . . . . . . : 00-13-CE-9C-24-EE
Dhcp Enabled. . . . . . . . . . . : No
IP Address. . . . . . . . . . . . : 192.168.0.7
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1

C:\Documents and Settings\Tim>

Same laptop IPconfig /all without specified ip address (autoconfig):

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Tim>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : ROADWARRIOR
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection 3:

Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : Realtek RTL8139 Family PCI Fast Ethe
rnet NIC #3
Physical Address. . . . . . . . . : 00-0F-B0-A3-28-5C

Ethernet adapter Wireless Network Connection 4:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/Wireless 2200BG Network
Connection
Physical Address. . . . . . . . . : 00-13-CE-9C-24-EE
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 0.0.0.0
Subnet Mask . . . . . . . . . . . : 0.0.0.0
Default Gateway . . . . . . . . . :
DHCP Server . . . . . . . . . . . : 255.255.255.255

C:\Documents and Settings\Tim>

IPconfig /all for other working laptop:

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Mary Ann>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : MaryAnnslaptop
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : Yes

Ethernet adapter Wireless Network Connection 2:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Broadcom 802.11b/g WLAN
Physical Address. . . . . . . . . : 00-14-A5-6B-A5-21
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.0.5
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCP Server . . . . . . . . . . . : 192.168.0.1
DNS Servers . . . . . . . . . . . : 192.168.0.1
Lease Obtained. . . . . . . . . . : Saturday, February 20, 2010 9:04:35 AM
Lease Expires . . . . . . . . . . : Sunday, February 21, 2010 8:45:48 AM
Ethernet adapter Local Area Connection:

Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : Realtek RTL8139/810x Family Fast Ethernet NIC
Physical Address. . . . . . . . . : 00-16-36-06-1C-C8

C:\Documents and Settings\Mary Ann>

Thanks, TR