Ethernet stops working?

[palz]

So I finally got ethernet working on iATKOS L2 (I have an NVIDIA nForce ethernet card) by using kexts from iATKOS S3. It worked well... for 60 seconds. After that, it just stopped loading web pages (the loading bar gets 1/8 of the way, and hangs there.) But the weird thing is that in the network prefpane, it says it's still connected, using DHCP, and gives me my LAN IP.... but I can't connect to my router's settings either (IP is 10.0.0.1, and it works whether or not the router is connected to the internet)!! Gah!!

This is extremely frustrating, can anyone help?

Full machine specs: Acer Aspire X1700
CPU: Intel Pentium Dual Core 2.4 GHz
GPU: NVIDIA GeForce G100 (Integrated)
Audio: Realtek HDA card
Network: Dial-up modem and NVIDIA nForce ethernet card
Mobo: nForce
DVD: Optiarc DVD+/-R & RAM drive