Can I get a little help with my Cable internet?

Hey, like I said, I'm having a little problem hooking up my wireless adapter to the cable modem base.

The base computer is hooked up and works fine. The system is in Normal mode for it, so it is definitely properly setup.

I have 4 other computers I'm trying to setup to connect with the base, and they are all wireless adapters. Do I need to purchase a new IP address for each computer? I thought I read something like that somewhere, but I don't really know if its true or not.

Has anyone else had to do this type of setup before? If so, please help me out a little. I can connect temporarily with the base computers network, but it insists on telling me that the ICS is unplugged.... I'm working with wireless adapter though!!!! Uuuuugggghhh, any help is appreciated.