[U-Boot] Help starting u-boot on an at91sam9260ek

[Fabio Porcedda]

Hi all,
i'm trying to use the u-boot on an at91sam9260ek board,
i cannot start successfull the u-boot binary.

build u-boot 2011.09:
export CROSS_COMPILE=/opt/arm-2010q1/bin/arm-none-linux-gnueabi-
/MAKEALL at91sam9260ek_nandflash

load & start:
RomBOOT
>

U-Boot 1.3.4 (Mar  9 2010 - 19:29:50)

DRAM:  64 MB
NAND:  256 MiB
DataFlash:AT45DB642
Nb pages:   8192
Page Size:   1056
Size= 8650752 bytes
Logical address: 0xD0000000
Area 0:	D0000000 to D00041FF (RO) Bootstrap
Area 1:	D0004200 to D00083FF      Environment
Area 2:	D0008400 to D0041FFF (RO) U-Boot
Area 3:	D0042000 to D0251FFF      Kernel
Area 4:	D0252000 to D083FFFF      FS
In:    serial
Out:   serial
Err:   serial
Net:   macb0
macb0: Starting autonegotiation...
macb0: Autonegotiation timed out (status=0x7849)
macb0: link down (status: 0x7849)
Hit any key to stop autoboot:  0 
U-Boot> loadb
## Ready for binary (kermit) download to 0x22000000 at 115200 bps...

(Back at ld2036)



----------------------------------------------------
(/home/fabiopo/) C-Kermit>send u-boot.bin
(/home/fabiopo/) C-Kermit>connect 
Connecting to /dev/ttyS0, speed 115200
 Escape character: Ctrl-\ (ASCII 28, FS): enabled
Type the escape character followed by C to get back,
or followed by ? to see other options.
----------------------------------------------------
## Total Size      = 0x00029d68 = 171368 Bytes
## Start Addr      = 0x22000000
U-Boot> go 0x22000000
## Starting application at 0x22000000 ...


I don't have problems running the linux4sam u-boot binary, 
using the same commands.
ftp://www.at91.com/pub/uboot/u-boot-1.3.4-exp.4/u-boot-1.3.4-exp.4-at91sam9260ek-nandflash.bin

I'm making something wrong?
Someone can help me?

Thanks in advance for any help
Fabio Porcedda