network interface not found

Suse 9.1 Pro. While booting, very often network card (integrated) is not found. Usually "few" restarts helps. Messages from log file are below. There is another computer with same configuration, usually no problems there. And same problem occur sometimes with other computers also... What could be reason & solution? MB: Epox 4PLAI 848P <notice>start services (network) Setting up network interfaces: lo lo IP address: 127.0.0.1/8 doneWaiting for mandatory devices: eth-id-00:04:61:4e:bb:5b 20 19 18 17 16 15 14 13 11 10 9 8 7 6 5 4 3 2 1 0 eth-id-00:04:61:4e:bb:5b No interface found failedSetting up service network . . . . . . . . . . . . . . . .failed <notice>exit status of (network) is (7)