我用的是QQ2440的开发板！我自己移植了一个uboot-116 我想用tftp下载内核（已经开通了tftp）但是确遇到了下面的问题！期待牛人的回复：

Environment size: 272/65532 bytes
kele2440 # ping 192.168.1.108
host 192.168.1.108 is alive
kele2440 # tftpboot 0x30000000 uImage
CS8900 Ethernet chip not found?!
TFTP from server 192.168.1.108; our IP address is 192.168.1.17
Filename 'uImage'.
Load address: 0x30000000
Loading: T T checksum bad
T checksum bad
T len bad 544 < 16992
T T len bad 78 < 16462
T T T checksum bad
T

U-Boot 1.1.6 (Dec 31 2010 - 14:36:43) for FriendlyARM MINI6410


CPU:     S3C6410@532MHz
         Fclk = 532MHz, Hclk = 133MHz, Pclk = 66MHz, Serial = CLKUART (SYNC Mode)
Board:   MINI6410
DRAM:    256 MB
Flash:   0 kB
NAND:    256 MB
In:      serial
Out:     serial
Err:     serial
MAC: 08:90:90:90:90:90
Hit any key to stop autoboot:  0

NAND read: device 0 offset 0x80000, size 0x500000

Reading data from 0x57f800 -- 100% complete.
5242880 bytes read: OK
Boot with zImage

Starting kernel ...

Uncompressing Linux...

我的到这里就挂了， 想用tftp 升级一下，但是就是不能停止boot的自启动？？？？？

Hit any key to stop autoboot:  0

运行到这里的时候， 怎么按键盘也不行