Via Rhine Ethernet I'm Using A VIA Rhine II Fast Ethernet Adapter

I'm using a VIA Rhine II Fast Ethernet Adapter - via rhine ethernet

I connected a Linksys router with 4 devices: desktop (wired), printer (cable), iPhone (without cable), laptop (WLAN). Suddenly, the desktop can not access the Internet and the status of "acquiring IP address" but never connects. In addition, the Office can not find, try my network, the Linksys Advisor. All other network devices work well and access the Internet. Modum I restarted the computer directly connected to them and the same result.