Cannot connect to internet wirelessly

I have a Linksys WRT54GC Compact Wireless-G Broadband Router. I'm currently using it at home, via a wired connection. I have used it at home before just fine. I then took it to school and it worked there as well. But when I brought it home again I started having trouble.
Home set up:
Phone line -> DSL modem -> router 1 -> my router -> my computer (and a PC and a TiVo).
I was not able to connect to the internet at all with my router in the mix (without it I could connect fine) and could see and connect to the router (wired and wireless). Linksys tech support was able to get me connect to the internet by having me plug the cable from the first router into the wired out #4. Does not make any sense to me but it works... for wired connections.
I can see my wireless network and connect to it, but haven't be able to access the router configuration page wirelessly (recently), and I don't get the internet wirelessly... on my PowerBook. However I can connect to the internet with my nintendo DS, so the problem seems to be with my computer.
Under my system preferences I get this when I'm connected through the routers wired connection:
Configure IPv4: Using DHCP
IP Adress: 192.168.2.100
Subnet Mask: 255.255.255.0
DHCP Client ID: (If required)
Router: 192.168.2.1
DNS Servers: (Optional)
Search Domains: (Optional)
IPv6 Address: fe80:0000:0000:0000:020a:95ff:fee0:0a0c
Ethernet ID: 00:0a:95:e0:0a:0c
At first when I connect via AirPort I get a whole lot of nothing:
AirPort ID: 00:0a:95:f7:98:b8
Configure IPv4: Using DHCP
IP Adress:
Subnet Mask:
DHCP Client ID: (If required)
Router:
DNS Servers: (Optional)
Search Domains: (Optional)
IPv6 Address: fe80:0000:0000:0000:020a:95ff:fee0:0a0c
And then I get an AirPort assigned IP address:
AirPort ID: 00:0a:95:f7:98:b8
Configure IPv4: Using DHCP
IP Adress: 169.254.191.42 (self-assigned)
Subnet Mask: 255.255.0.0
DHCP Client ID: (If required)
Router:
DNS Servers: (Optional)
Search Domains: (Optional)
IPv6 Address: fe80:0000:0000:0000:020a:95ff:fee0:0a0c
If I manually set the IPv4 to the same settings as the ethernet settings it still does not work. I don't know what to do. If you need more info to be able to help let me know.

The 169.254.191.42 (self-assigned) simply means it isn't getting a response from any DHCP server/router.
I don't think it's ging to work with the first router plugged into LAN#4. I "think" the problem is/was that router #2 was also trying to hand out DHCP, it should just be set to be a dumb hub, passing DHCP from the 1st one.
Some Routers also need to be set to share the Wired/Wireless ports.
Also, if you have both Ethernet and Wireless in use, the order of the interfaces in Network>Show:>Network Port Configurations is important, the top being used for Internet, but you can drag them into other positions in the list.

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Hi,
This is a hardware thing and the wireless card does not support this. Changing the wireless card may be the way to go.
Hope this helps.
BH
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