problem on usb boot from mini itx

hail,

I'm trying to make a router from a mini itx, but can't get it to boot from
usb disk or stick. I can boot from usb cdrom and install ok, 7.1 and 7.0.
but when I try to boot, I get to the point:

F1 FreeBSD

and press enter.

then I get:
Can't work out which disk we are booting from.
Guessed BIOS device 0x80 not found by probes, defaulting to disk0:

can't load 'kernel'

Type '?' for a list of commands, 'help' for more detailed help.
OK

lsdev gives me:

cd devices:
disk devices:
pxe devices:

so, I got to the point it can't find my usb disk, but I don't know why as
in boot cd it says the disk0 ok. so I copied all cd boot stuff
(boot/cdboot/etc) to see if I can use that to again see my disk, but I got
nowhere :(

I used the usb disk on other pc and all went fine, even compiled current
(my target branch) to see if most recent usb boot things (read some from
two threads here, not got deep though) and also nothing :(

is there anything I can do ?

dmesg follows

thanks,

matheus

the dmesg:

Copyright (c) 1992-2009 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 8.0-CURRENT #0: Sun Mar  1 22:52:45 BRT 2009
    root_at_cygnus.apartnet:/usr/obj/usr/src/sys/Cygnus8
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Transmeta(tm) Crusoe(tm) Processor TM5700 (798.13-MHz 586-class CPU)
  Origin = "GenuineTMx86"  Id = 0x543  Stepping = 3
  Features=0x84893f<FPU,VME,DE,PSE,TSC,MSR,CX8,SEP,CMOV,PN,MMX>
real memory  = 117374976 (111 MB)
avail memory = 100130816 (95 MB)
kbd1 at kbdmux0
pcib0: <Host to PCI bridge> pcibus 0 on motherboard
pir0: <PCI Interrupt Routing Table: 5 Entries> on motherboard
pci0: <PCI bus> on pcib0
pci0: <memory, RAM> at device 0.1 (no driver attached)
pci0: <memory, RAM> at device 0.2 (no driver attached)
pci0: <memory, RAM> at device 0.3 (no driver attached)
uhci0: <VIA 83C572 USB controller> port 0xe000-0xe01f irq 15 at device 9.0
on pci0
uhci0: [ITHREAD]
uhci0: LegSup = 0x201a
usbus0: <VIA 83C572 USB controller> on uhci0
uhci1: <VIA 83C572 USB controller> port 0xe100-0xe11f irq 5 at device 9.1
on pci0
uhci1: [ITHREAD]
uhci1: LegSup = 0x2010
usbus1: <VIA 83C572 USB controller> on uhci1
ehci0: <VIA VT6202 USB 2.0 controller> mem 0xe8131000-0xe81310ff irq 10 at
device 9.2 on pci0
ehci0: [ITHREAD]
usbus2: EHCI version 1.0
usbus2: <VIA VT6202 USB 2.0 controller> on ehci0
vgapci0: <VGA-compatible display> port 0xe200-0xe2ff mem
0xe0000000-0xe7ffffff,0xe8120000-0xe812ffff irq 11 at device 13.0 on pci0
isab0: <PCI-ISA bridge> at device 17.0 on pci0
isa0: <ISA bus> on isab0
atapci0: <VIA 8231 UDMA100 controller> port
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xe300-0xe30f at device 17.1 on pci0
ata0: <ATA channel 0> on atapci0
ata0: [ITHREAD]
ata1: <ATA channel 1> on atapci0
ata1: [ITHREAD]
pci0: <bridge> at device 17.4 (no driver attached)
vr0: <VIA VT6102 Rhine II 10/100BaseTX> port 0xe600-0xe6ff mem
0xe8130000-0xe81300ff irq 15 at device 18.0 on pci0
vr0: Quirks: 0x0
vr0: Revision: 0x51
miibus0: <MII bus> on vr0
ukphy0: <Generic IEEE 802.3u media interface> PHY 1 on miibus0
ukphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
vr0: Ethernet address: 00:13:21:ee:26:00
vr0: [ITHREAD]
cpu0 on motherboard
pmtimer0 on isa0
atrtc0: <AT realtime clock> at port 0x70-0x71 irq 8 pnpid PNP0b00 on isa0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 irq 1 pnpid
PNP0303 on isa0
atkbd0: <AT Keyboard> irq 1 on atkbdc0
kbd0 at atkbd0
atkbd0: [GIANT-LOCKED]
atkbd0: [ITHREAD]
unknown: <PNP0c01> can't assign resources (memory)
orm0: <ISA Option ROMs> at iomem 0xc0000-0xc8fff,0xcc000-0xd5fff pnpid
ORM0000 on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
ppc0: parallel port not found.
unknown: <PNP0c01> can't assign resources (memory)
Timecounter "TSC" frequency 798131036 Hz quality 800
Timecounters tick every 1.000 msec
usbus0: 12Mbps Full Speed USB v1.0
usbus1: 12Mbps Full Speed USB v1.0
usbus2: 480Mbps High Speed USB v2.0
ugen0.1: <VIA> at usbus0
ushub0: <VIA UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
ugen1.1: <VIA> at usbus1
ushub1: <VIA UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus1
ugen2.1: <VIA> at usbus2
ushub2: <VIA EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus2
ad0: 6149MB <SAMSUNG SV0643D KT100> at ata0-master UDMA33
GEOM: ad0s1: geometry does not match label (255h,63s != 15h,63s).
ushub0: 2 ports with 2 removable, self powered
ushub1: 2 ports with 2 removable, self powered
Root mount waiting for: usbus2
Root mount waiting for: usbus2
ushub2: 4 ports with 4 removable, self powered
Trying to mount root from ufs:/dev/ad0s1a
usb2_alloc_device:1463: set address 2 failed (ignored)
usb2_alloc_device:1499: getting device descriptor at addr 2 failed!
usb2_req_re_enumerate:1414: addr=2, set address failed! (ignored)
usb2_req_re_enumerate:1427: getting device descriptor at addr 2 failed!
usb2_req_re_enumerate:1414: addr=2, set address failed! (ignored)
usb2_req_re_enumerate:1427: getting device descriptor at addr 2 failed!
ugen0.2: <> at usbus0 (disconnected)
uhub_reattach_port:414: could not allocate new device!



-- 
We will call you cygnus,
The God of balance you shall be