Everything was working fine...

Hi, I have a problem with my network. Everything was working fine then suddenly one of my computers could no longer connect to the internet. I am running a dual NIC setup on the comp which shares the internet:
Let's call it Comp-A
NIC-1 connects to my cable modem.
NIC-2 connects to my switch/hub.

Comp-B
NIC-1 connects to my switch/hub

Both are on WinXP Pro and set up with the ICS wizard.
I formatted Comp-B and got it to the point where it could connect to the internet but couldn't access various sites.
I can access URL but I can't access URL Update/MSN messenger. Comp-A can access all of these.
All cable are secure and operational.

If I connect Comp-B directly to the modem without going through Comp-A everything is fine.

What happens when you try to access these sites?

Have you setup DNS properly? On the network connection, you need to enter in the DNS servers from your ISP.

When I try to open URL it will try to open it normally but nothing is recieved. The status bar will say "Opening http://www.microsoft.com..."
The title bar stays at "about:blank"
The page has been trying to load for over 10 minutes without an error page

However, when I select Tools>Windows Update the title bar will change from about:blank to Microsoft Windows Update.
After a few minutes I will get the "cannot display page" error.

I can access msn.ca and do a search for "windows update" and access the windows update page normally though. But loading is very slow, about 5 minutes to load the pages. After I scan and pick the updates and press install i will get a page saying an error occured.

This is very strange. Everything was working flawlessly before. And it can connect fine if I connect directly to the modem.

I believe I have setup the DNS servers properly. Here are my settings for my computers and their NICs:
Comp-A
NIC1(Internet)
IP address - 65.49.0.147
Subnet Mask - 255.255.248.0
Default Gateway - 65.49.0.1
DHCP Server - 24.153.23.10
DNS Servers - 24.153.23.66
24.153.22.185

NIC2(LAN)
IP address - 192.168.0.1
Subnet Mask - 255.255.255.0
DNS Servers - 24.153.23.66
24.153.22.185

Comp-B
NIC1
IP address - 192.168.0.65
Subnet Mask - 255.255.255.0
Default Gateway - 192.168.0.1
DHCP Server - 192.168.0.1
DNS Servers - 24.153.23.66
24.153.22.185

Ahhhh forget it, I will just format both computers and setup my network from scratch. Thanks for trying to help me out

If it still doesn't work then I'll be back again.