I read the text in your other thread. (You may wish to transfer it here since the other thread is now closed.) Anyway, I have two suggestions. First, delete the interface and restart the computer. It should detect things correctly this time. (It should "install" new devices using NetworkManager.) Connecting to a regular Ethernet device should be a no-brainer for SUSE 10.0 or 10.2. (10.1 was garbage.)
If that does not help, check out the troubleshooting section on this page
. It is mostly oriented toward wireless connections, but 95% of it is valid for wired connections as well. Good luck in any case.