3Com 3c900 problem

[Dzajro]

I have RH6.0 with kernel 2.2.5-15 and :

eth0: 3Com 3c900 Boomerang 10Mbps Combo at 0xdc80,  00:60:08:c8:be:e4, IRQ 9
  8K word-wide RAM 3:5 Rx:Tx split, autoselect/10baseT interface.
  Enabling bus-master transmits and whole-frame receives.

It's running very well, but after few minutes it stops working and kernel is
logging this(3-5x per second):

Jun 18 12:11:08 ns kernel: eth0: transmit timed out, tx_status 00 status
e000.
Jun 18 12:11:08 ns kernel:   Flags; bus-master 1, full 1; dirty 735 current
751.
Jun 18 12:11:08 ns kernel:   Transmit list 00000000 vs. c0b3b2f0.
Jun 18 12:11:08 ns kernel:   0: @c0b3b200  length 8000002a status 0000002a
Jun 18 12:11:08 ns kernel:   1: @c0b3b210  length 8000002a status 0000002a
Jun 18 12:11:08 ns kernel:   2: @c0b3b220  length 8000002a status 0000002a
Jun 18 12:11:08 ns kernel:   3: @c0b3b230  length 8000002a status 0000002a
Jun 18 12:11:08 ns kernel:   4: @c0b3b240  length 8000002a status 0000002a
Jun 18 12:11:08 ns kernel:   5: @c0b3b250  length 8000002a status 0000002a
Jun 18 12:11:08 ns kernel:   6: @c0b3b260  length 8000002a status 0000002a
Jun 18 12:11:08 ns kernel:   7: @c0b3b270  length 8000006e status 0000006e
Jun 18 12:11:08 ns kernel:   8: @c0b3b280  length 8000006e status 0000006e
Jun 18 12:11:08 ns kernel:   9: @c0b3b290  length 800000e3 status 000000e3
Jun 18 12:11:08 ns kernel:   10: @c0b3b2a0  length 8000002a status 0000002a
Jun 18 12:11:08 ns kernel:   11: @c0b3b2b0  length 8000002a status 0000002a
Jun 18 12:11:08 ns kernel:   12: @c0b3b2c0  length 8000002a status 0000002a
Jun 18 12:11:08 ns kernel:   13: @c0b3b2d0  length 800000e3 status 800000e3
Jun 18 12:11:08 ns kernel:   14: @c0b3b2e0  length 8000002a status 8000002a
Jun 18 12:11:08 ns kernel:   15: @c0b3b2f0  length 800000f5 status 000000f5
Jun 18 12:11:08 ns kernel: eth0: Resetting the Tx ring pointer.

Procesor is PII Celeron (Mendocino) 333MHz.

It's driver problem? Can somebody help me ?

Igor Zamocky