Media for Router--Router--Internet setup not working....

Router--Router--Internet setup not working....

Hi Folks,

Hoping that someone here could please help.

I am trying to help a friend setup a home network. They connect to the internet via a Belkin ADSL Modem which has a single ethernet port at the back. I suppose you could call it a Single port router.

They got given a D-Link 4 port router with wifi (DI-524 from memory), and this now sits between the PC (WinXP SP2) and the the Belkin ADSL modem. They also have a laptop which connects via the wifi (Vista).

The internet appears to work intermittently, it will go for varying lengths of time before you start to receive page cannot be displayed.

I have done the most basic of diagnosing when the connection went down:

Could ping the D-Link on 192.168.0.1
Could ping the Belkin on 10.1.1.1
Could not ping a website, using the dns name or the IP (so it would appear not to be a DNS issuse)
IPCONFIG showed the PC having a IP assigned

Pictorially, the wired PC setup looks like:

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I think (will have to confirm this) that when the internet stops working, I can plug the Belkin directly into the PC and it will work again, so it appears to be some sort of issue between the Belkin and the D-Link?

What other testing can I do?

Thanks in advance,

-Al