求助改nand flash 128M的问题

首先非常感谢版面上面郑生的参考代码我的系统终于可以启动了.
改128M Nand后的问题如下:
Windows CE Kernel for ARM (Thumb Enabled) Built on Jun 24 2004 at 18:25:00
ProcessorType=0920  Revision=0
sp_abt=ffff5000 sp_irq=ffff2800 sp_undef=ffffc800 OEMAddressTable = 8023df90
DCache: 8 sets, 64 ways, 32 line size, 16384 size
ICache: 8 sets, 64 ways, 32 line size, 16384 size
OlymPics Project based on WinCE 5.0 & S3C2440A (Build 20080920)
::: InitDisplay in Init.c
Sp=ffffc7cc
[OEMIO:INF] + IOCTL_HAL_POSTINIT
[OEMIO:INF] - IOCTL_HAL_POSTINIT
OEMIoControl: Unsupported Code 0x101008c - device 0x0101 func 35
NFLAT_PS: DLL_PROCESS_ATTACH
NFLAT_PS: DSK_Init entered
NFLAT_PS: +CreateDiskObject
NFLAT_PS: -CreateDiskObject
NFLAT_PS : ActiveKey (copy) = Drivers\BlockDevice\FlashDrv (@ 0x00072C10)
NFLAT_PS: InitDisk BEGIN
NFLAT_PS: InitializeNAND BEGIN
GetPocketStoreParameter()
aXID[1] = 0xf1
At end of GetPocketStoreParameter::
系统启动到这里有时就不动了，是什么原因
麻烦各位大侠指点一下,多谢，多谢