Problem Using WRT54G As Router/Gateway

Have a home network with following configuration:
Windows 2000 domain with one box acting as the domain server, the DNS server, and the DHCP server.
4 PCs with wired connections to an 8 port hub.  All of the wired PCs point to the domain server for DNS/DHCP.
A DSL modem routed through a sonicwall firewall to the 8 port hub (I don't knw if I'm saying this right, but all wired PC's are routed to the firewall then out to the internet, while all incoming traffic is routed through the firewall before reaching the LAN).
This wired network has worked fine, but we also have a number of laptops with wireless adapters, so we purchased a WRT54G to work with these laptops.
My idea was to just have the WRT54G attached to one of the ports on the hub (with no direct connection to a computer) and have all of our laptops connect to the WRT54G wirelessly, then be routed back and forth using the WRT54G.
Was finally able to set up the WRT54G with only one connection (via one of the 4 ports on the back of the WRT54G) to the (wired) 8 port hub.  Our laptops generally can see the WRT54G, but routing is intermittant at best.  I disabled DHCP on the WRT54G...this seemed to help, but not for long.  I also established a reserved IP for the WRT54G on the DHCP server, but the intermittant problem still keeps happening (seems to route on the laptops for a while, then it just stops).  In Basic Setup, I set the Internat Connection Typt to "Automatic Configuration - DHCP".  IN Advanced Routing, I set the operating mode to "Router" (vs. Gateway).
Can anyone tell from this description where I'm going wrong?  I can get the laptops to see the wireless and route for a short time, but it never seems to keep working (also note that on a couple of the laptops, the network icon states that the laptop was not able to connect to the wireless network...but it's able to route using IE????).
Thanks for any help!
Dan

Thanks Helm.
I had done what you suggested (which is consistent with directions I found last night at directions I've found at http://routersetup.blogspot.com/2007/08/connecting-two-routers-wired.html), but I'm still having some intermittant problems.  My Vista laptop doesn't seem to be having any problems at all, while one of the two XP boxes will connect for (only) a couple minutes after rebooting, and the other XP machine will not connect at all (although it seems to find the wrt54g...it just ends up saying it's having a dns problem).
With this in mind, I think my problem is not necessarily related to the wrt54g now (although we do have cordless phones, but they are 5.4 ghz)....will keep playing with this...is there any limit to the number of laptops that can be connected this way?
Message Edited by DanJ on 12-24-2007 03:31 PM

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