smc router and existing wired connection?

I have had a network at my factory for a few years now. We haev
internet on some computers, others do not, but all computers can
connect to each other. I decided to add wireless internet access so I
can travel through the factory. I set up my smc router so now I have
wireless internet access no problem. However, I can no longer connect
to other computers on the network from the main computer the router is
attached to , OR any of the wireless computers (the wired computers
still can interact with each other). Any help would be greatly
appreciated. My settings:

Main computer IP: 192.168.2.100
Subnet mask 255.255.255.0
Gateway 192.168.2.1
Primary DNS 192.168.2.1

in the router I ran the setup wizard, and when it came to dns I put in
my ISP's DNS info they gave me. Now like I said, my computer can
connect to the internet, and all wireless comps can connect to the
internet. Just not with each other.