I am on a desktop that is connected to a Linksys WRT54G router using a wired connection. I have AT&T ADSL. After an hour or so of use I am unable to browse the internet, use AIM, or anything of the sort. However, my local area connection status is still connected. The computer that is directly connected to the modem does not have any problems, along with the laptop that is connected to the router by a wireless connection. I have tried using the ipconfig /flushdns command, but it didn't work. The only method that has worked for me is restarting my computer. If you need more information I would be happy to provide it.