09-03-2006, 11:55 AM
Have you tried power cycling the setup?
If you haven't, or if you don't know what I mean by this, just follow these steps in this order:
1. Power everything down (modem, router and ALL computers involved)
2. Wait at least one full minute
3. Power the modem back on and wait for it to cycle through its startup sequence. You should see the lights come on, one at a time, then start to flash.
4. Power the router back on
5. Power on the computers, starting with the ones connected via ethernet (wired) and ending with the wireless ones.
This sequence should allow all the computers to pull fresh DHCP and allow them to connect to the internet at the same time.