XSCF can not boot message XSCF FAULT (reason=0)

SCF board boot factor = 4080
memory test ..
Memory compare test
................finish
    DDR Real size: 256 MB
    DDR: 224 MB

## Booting image at ff800000 ...
   Image Name:   XSCF kernel 01100001 2.6.11.12-s
   Image Type:   PowerPC Linux Kernel Image (gzip compressed)
   Data Size:    1457363 Bytes =  1.4 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
## Loading RAMDisk Image at ff980000 ...
   Image Name:   XSCF rootfs 01100002 ,2011/05/12
   Image Type:   PowerPC Linux RAMDisk Image (gzip compressed)
   Data Size:    5486484 Bytes =  5.2 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Ramdisk to 0bac4000, end 0bfff794 ... OK
XSCF uboot  01100001  (Feb  3 2011 - 14:43:12)

XSCF uboot  01100001  (Feb  3 2011 - 14:43:12)

SCF board boot factor = 40c0
    DDR Real size: 256 MB