dc0 not working on XP1000

[Riccardo.Veraldi at fi.infn.it]

Hello,
on XP1000 with FreeBSD-4.8

dc0: <Intel 21143 10/100BaseTX> port 0x80010000-0x8001007f mem
0x81051000-0x810513ff irq 45 at device 3.0 on pci1
dc0: interrupting at TSUNAMI irq 45
dc0: Ethernet address: 08:00:2b:86:63:ff

it works only 10BAse/T

this is really weird.
I Tryed every kind of switch with it and hubs and it works only 10Base/T
if I force it to 100BaseTX with or without full-duplex it does nto work
it goes like 2KB/sec.
this is the on board dc0.
Could it be broken or something?

anyone has some hints for me abotu dc0 on XP1000 ?
thank you very much

Rick