NIC only works at 10 Mbps/Half Duplex

Ever since I got this MOBO (almost 1 year ago), I have not been able to connect faster than 10 Mbps/Half Duplex with my ADSL modem. Any attempt to change speed will result in Windows indicating tha the cable is unpluged (Auto mode does not work either). I've updated BIOS, NIC drivers, I've installed WinXP (and re-installed) with and without SP1 and SP2. I've also changed cables with no luck.
I got an external NIC from a friend and could connect at 100 Mbps/Full Duplex so the problem is NOT on the modem side.
System info shows the internal NIC shares IRQ 18 with a USB controller wich I uninstalled just to see if it would make a difference. Same results.
I've just installed the latest drivers from INTEL and I'm still getting the same problem.
Any ideas?
Help will be greatly appreciated.
Abraham

Don't know how to fix this but I had the same problem when I was connected directly to my cable modem. I eventually got it to run manually at 10Mbs-full duplex and didn't worry about it further since that's faster than actual transfer speeds from my ISP anyway.
I then configured a wireless network using a Linksys router and noticed that my NIC now automatically connects at 100Mbs-full dupex as it should.
If you feel this limiting your actual transfer speeds(it wasn't in my case) you might consider purchasing an inexpensive router. This will also give you the benefit of having a hardware firewall.

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    So can set full duplex with 100 Mbps at both the end side in coordination with your ISP.
    Hope to Help !!
    Ganesh.H
    Remember to rate the helpful post

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