Connection Troubles

[chaos945]

Okay, I have 4 network adapters and the only one that connects to my ADSL Provider is the one they gave me, the SMC EZ Card. This is a problem because it really sucks and I want to use my 3Com Integrated adapter on my motherboard or at least one of the other two. But every time I switch to any of my other cards my internet won't connect; I look in my DNS and IP config and all the correct info is there it is even connecting to my DHCP and getting a new IP, but.....no internet. Anyone have a clue what’s going on here?

My Modem:
DLink ADSL Ethernet Modem

My Service:
ADSL High Speed 500/100kbps

My Network Adapters:
3Com 3C920B-EMB Integrated
NVIDIA nForce MCP Networking Adapter Integrated
SMC EZ Card PCI
DLink DFE-538TX/R PCI

My Motherboard:
Asus A7N8X Deluxe

 

[lieb39]

Whats your OS?

 

[chaos945]

Windows XP Pro (legit) SP1

 

[Zedric]

The ISP may have locked your MAC address. Every NIC has a (sortof) unique MAC address. Some ISP:s lock them for security reasons (beats me). This means that you can't change computer or NIC unless the ISP unlocks it.

 

[chris]

If you are changing the NIC for the internet then yeah the MAC address will come into it. When i swapped what i used for my cable modem i had to completely switch off the modem and unplug it from the computer for 3 hours, in a way making the modem forget the MAC address. After waiting I plugged it back into the new NIC and it updated the address and worked fine.