eth1: Transmit error?

[inetd]

My gateway generates the following error message peroidically in /var/log/message:

Sep 23 15:41:32 gate01 kernel: eth1: Transmit error, Tx status register 82.
Sep 23 15:41:32 gate01 kernel: Probably a duplex mismatch. See Documentation/networking/vortex.txt
Sep 23 15:41:32 gate01 kernel: Flags; bus-master 1, dirty 18786(2) current 18786(2)
Sep 23 15:41:32 gate01 kernel: Transmit list 00000000 vs. ce403280.
Sep 23 15:41:32 gate01 kernel: 0: @ce403200 length 8000019b status 0001019b
Sep 23 15:41:32 gate01 kernel: 1: @ce403240 length 8000019c status 8001019c
Sep 23 15:41:32 gate01 kernel: 2: @ce403280 length 80000042 status 00010042
Sep 23 15:41:32 gate01 kernel: 3: @ce4032c0 length 80000042 status 00010042
Sep 23 15:41:32 gate01 kernel: 4: @ce403300 length 8000003e status 0001003e
Sep 23 15:41:32 gate01 kernel: 5: @ce403340 length 80000036 status 00010036
Sep 23 15:41:32 gate01 kernel: 6: @ce403380 length 800001a2 status 000101a2
Sep 23 15:41:32 gate01 kernel: 7: @ce4033c0 length 800001a3 status 000101a3
Sep 23 15:41:32 gate01 kernel: 8: @ce403400 length 80000036 status 00010036
Sep 23 15:41:32 gate01 kernel: 9: @ce403440 length 8000019c status 0001019c
Sep 23 15:41:32 gate01 kernel: 10: @ce403480 length 800001a5 status 000101a5
Sep 23 15:41:32 gate01 kernel: 11: @ce4034c0 length 80000193 status 00010193
Sep 23 15:41:32 gate01 kernel: 12: @ce403500 length 80000193 status 00010193
Sep 23 15:41:32 gate01 kernel: 13: @ce403540 length 80000193 status 00010193
Sep 23 15:41:32 gate01 kernel: 14: @ce403580 length 8000019b status 0001019b
Sep 23 15:41:32 gate01 kernel: 15: @ce4035c0 length 8000019c status 0001019c

The eth1 is a 3c905C-Tx lan card connecting to internet with fixed and static ip. How can I fix the above problem?

Thanks.