WRT54Gv2 - Router suddenly won't accept wireless connections

When using my internet this morning it suddenly stopped working on wireless. The internet still works through ethernet.
I have downloaded the firmware but I cannot install it as I cannot connect to the admin page for the router.
Following is the results from ipconfig. I have tried accessing the page on both 192.168.1.1 and 86.21.24.1 and neither works.
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : SiS 900 PCI Fast Ethernet Adapter
Physical Address. . . . . . . . . : xx-xx-xx-xx-xx
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 86.21.25.231
Subnet Mask . . . . . . . . . . . : 255.255.252.0
Default Gateway . . . . . . . . . : 86.21.24.1
DHCP Server . . . . . . . . . . . : 62.252.0.21
DNS Servers . . . . . . . . . . . : 194.168.4.100
194.168.8.100
NetBIOS over Tcpip. . . . . . . . : Disabled
Lease Obtained. . . . . . . . . . : 07 September 2007 13:37:55
Lease Expires . . . . . . . . . . : 14 September 2007 12:43:17
Ethernet adapter Wireless Network Connection:
Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : Wireless-G Notebook Adapter
Physical Address. . . . . . . . . : xx-xx-xx-xx-xx-xx
I have tried resetting the router but it does not seem to return to the factory settings. Not entirely sure what to do.
Thanks in advance for any help.

Thanks for the suggestion!
Done that and now it does this:
Windows IP Configuration
Host Name . . . . . . . . . . . . : tom
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Unknown
IP Routing Enabled. . . . . . . . : Yes
WINS Proxy Enabled. . . . . . . . : No
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : SiS 900 PCI Fast Ethernet Adapter
Physical Address. . . . . . . . . : 00-40-D0-47-4C-E8
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Autoconfiguration IP Address. . . : 169.254.150.107
Subnet Mask . . . . . . . . . . . : 255.255.0.0
Default Gateway . . . . . . . . . :
Ethernet adapter Wireless Network Connection:
Media State . . . . . . . . . . . : Media disconnected
Description . . . . . . . . . . . : Wireless-G Notebook Adapter
Physical Address. . . . . . . . . : 00-0C-41-C7-62-70
Still can't access the web-based setup page on any ip.
Thanks again for any help.

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