ipconfig There is no adapter for that operation

We recently got a new router for the office (a wireless Netgear fvg318) to
replace our wired only linksys. After we set everything up though we hit a
brick wall. $ of our seven (wired and wireless) computers couple connect. I
tranced the problem to the 4 not updating the default gateway to the new IP
but when using the command line to do ipconfig/release ipconfig/refresh, and
evne after rebooting and reseting the router and modem it doesn't work.

When i use IP config i get a error "there is no adapter for that operation"

i know that the problem is the 4 not conection to the right defautl gateway
but i cant figure out how to get them to release. They are 3 XP Pros and our
network intranet server a Microsoft Server 2003. While the 3 that CAN connect
are a XP Home, Vista, and Mac osx tiger