[BusyBox] How to fix this problem.?

[HS8JCV]

Hi all.
Now.It is message from u-boot in my board and u-boot parameter.

U-Boot 1.1.2 (Jun 25 2005 - 13:39:21)

U-Boot code: 21F00000 -> 21F167D0  BSS: -> 21F1AE90
RAM Configuration:
Bank #0: 20000000 32 MB
ST: M29W160EB (16Mbit)
Flash:  2 MB
In:    serial
Out:   serial
Err:   serial
Hit any key to stop autoboot:  0 
U-Boot> printenv
bootdelay=3
baudrate=115200
ethaddr=12:34:56:78:99:aa
bootargs=root=/dev/ram rw initrd=0x21100000,6000000 ramdisk_size=15360
console=ttyS0,115200,mem=32M
bootcmd=run cpfltoker;run cpfltoram;run boot
boot=bootm 21000000
cpfltoker=cp.b 10020000 21000000 bf6c4
cpkertofl=cp.b 21000000 10020000 bf6c4
cpfltoram=cp.b 100E0000 21100000 10ed07
cpramtofl=cp.b 21100000 100E0000 10ed07
filesize=10ed07
fileaddr=21100000
ipaddr=192.168.0.15
serverip=192.168.0.103
stdin=serial
stdout=serial
stderr=serial

Environment size: 535/8188 bytes
U-Boot> 

And after I run cmdboot.
It can boot from old kernel.

## Booting image at 21000000 ...
   Image Name:   
   Image Type:   ARM Linux Kernel Image (gzip compressed)
   Data Size:    784004 Bytes = 765.6 kB
   Load Address: 20008000
   Entry Point:  20008000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK

Starting kernel ...

Linux version 2.4.27-vrs1 (amine at PC0142) (gcc version 2.95.3 20010315
(release)) #3 Sat Oct 2 21:22:47 CEST 2004
CPU: Arm920Tid(wb) revision 0
Machine: ATMEL AT91RM9200
................................
.............................
AT91RM9200DK Login :


But after I complie new kernel.
and run
U-Boot> tftp 21000000 uImage
TFTP from server 192.168.0.103; our IP address is 192.168.0.15
Filename 'uImage'.
Load address: 0x21000000
Loading: #################################################################
 done
Bytes transferred = 735272 (b3828 hex)
U-Boot> tftp 21100000 ramdisk.gz
TFTP from server 192.168.0.103; our IP address is 192.168.0.15
Filename 'ramdisk.gz'.
Load address: 0x21100000
Loading: #################################################################
done
Bytes transferred = 2127430 (207646 hex)
U-Boot> 

and run 
U-Boot>run boot
## Booting image at 21000000 ...
   Image Name:   
   Image Type:   ARM Linux Kernel Image (gzip compressed)
   Data Size:    735208 Bytes = 718 kB
   Load Address: 20008000
   Entry Point:  20008000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK

Starting kernel ...

and still and not response anyting.
Why.?
How to solve this problem.?

Sorry for language.
I little english language.

Regard
Mr.X