Our LAN setup at work consists of a router wired into a set of hubs. The points connected correspond to wired macs plugged in at data points throughout the building. An airport router also hangs of one of the points on the hub. I have no problems with wired or wireless macs accessing the network, however, i do have issues with PC laptops that clients etc bring into our work. When a connection is attempted to the wireless, in the microsoft wireless client i can connect, however looking at the Status, the DHCP server on our router fails to allocate the correct network range/gateway details to the PC laptop. I always have to either plug in a wire into the laptop and/or enter the TCP/Gateway/DNS details manually. I suspect this is because the Airport router is not allocating the correct 192.168.x.x range to the PCs, and is always distributing the incorrect range 10.0.x.x in all the fields. How do i fix this?
I'd just like the PC laptop users to just hit their wireless access, type in password and et voila surf the web, etc...

~Pulling what little hair i have left out...

How do i that? Using Airport Admin util?

I turned off the custom wireless client on the PC to access the Microsoft one only. It still doesn't work 100%. The funny thing is yesterday, our client came over and she connected no probs. She popped out to lunch, and when she came back, it stopped working, although nothing had changed on her computer.

Yeah, I'd reset it. Also, make sure it's able to be administered from the connection path you're on (as you can disable wireless configuration on an ABS)

(airport base station)