Can't Connect Using IP Phone's Built-in Router?

I have no problems when the computer is connected to a router. That's how I'm posting here now. But my router is old and has no QOS. So the sound quality is choppy when I connect the phone to the router. So I tried connecting the phone directly to the cable modem, with the computer using the phone's router for internet. The phone's sound quality is great that way. But then the computer won't connect to the internet.When I hover over the network icon in the systray, it says "Local Area Connection 4 is now connected. Speed: 1.0 Gbps" The phone's router is a gigabit connection. So I think that tells me that the computer is seeing the phone/router and the cables are okay.I just tried to Repair through the network icon. It fails because it can't renew. I checked Window's Event Viewer to see what kind of error that might have created. This is the error:[CODE]