一键烧录SD卡遇到问题如下：
1：启动开关设置:1,2,3 为0；4，5，6，7，8 为1;
2:按一键烧录说明烧好SD卡（4G），插入开发板；
3：接上串行线，USB线
4：开启dnw;
5:接通开发板电源；
电脑提示：无法识别USB设备。试图安装，找遍飞凌公司提供的盘片资料（包括dnw下载驱动），没有合适的驱动可安装。。
dnw信息区显示：
=============== USB Receive Test ==============
Error: can't receive data from the USBD
===============================================

Welcome! This tool just for TE/OK6410
+OALArgsInit()
SocID:0x36410101
Arguments area is initialized
-OALArgsInit()
INFO: (unsigned)C_IsrHandler : 0x8006684C
INFO: (unsigned)ASM_IsrHandler : 0x8006861C
INFO: (unsigned)pISR : 0xEA01A17F
HSMMC init
[HSMMC1] Setting registers for the EPLL (for SDCLK) : SYSCon.
[HSMMC0] Setting registers for the GPIO.
[HSMMC1] Setting registers for the EPLL : HSMMCCon.
#### this SD card is made on SPEC 2.0
This SD card is made on SPEC 2.0
This SD card is High Capacity

CardSize: 7729152 sector
[HSMMCLIB:INF] ClockConfig() Card Working Frequency = 24MHz
BP_Init
[FMD] ++FMD_Init() ****
[FMD:INF] FMD_Init() : Read ID = 0x0000ecd3
[FMD] FMD_Init() : NUM_OF_BLOCKS = 4096
[FMD] FMD_Init() : PAGES_PER_BLOCK = 128
[FMD] FMD_Init() : SECTORS_PER_PAGE = 4
[FMD] --FMD_Init()
[FMD] FMD_GetInfo() : NUMBLOCKS = 4096(0x1000), SECTORSPERBLOCK = 128(0x80), BYTESPERSECTOR = 2048(0x800)
[FMD] FMD_GetInfo() : NUMBLOCKS = 4096(0x1000), SECTORSPERBLOCK = 128(0x80), BYTESPERSECTOR = 2048(0x800)
wNUM_BLOCKS : 4096(0x1000)
[Eboot] ++InitializeDisplay()
[Eboot] --InitializeDisplay()
Press [ENTER] to launch image stored on boot media, or [SPACE] to enter boot monitor.

Initiating image launch in 3 seconds.

Starting auto-download ...
Erase  the block '0..3'
System ready!
Preparing for download...
IsCardInserted
g_pDownPt = 0xA300211B

BL_IMAGE_TYPE_MANIFEST


BL_IMAGE_TYPE_UNKNOWN


Download BIN file information:
-----------------------------------------------------
[0]: Base Address=0x0  Length=0x2000
-----------------------------------------------------
----------------------------------------------(文件较大，省略一部分）
chainInfo.dwLoadAddress: 0X00000000
chainInfo.dwFlashAddress: 0X00000000
chainInfo.dwLength: 0X00000000
}
waitforconnect
INFO: using TOC[1] dwJumpAddress: 0x80157734
INFO: OEMLaunch: Jumping to Physical Address 0x50157734h (Virtual Address 0x80157734h)...

鼿Windows CE Kernel for ARM (Thumb Enabled) Built on Sep 25 2009 at 11:04:23
[OAL] ++OEMInit()
[OAL] S3C6410_APLL_CLK   : 532000000
[OAL] ARMCLK : 532000000
[OAL] HCLK   : 133000000
[OAL] PCLK   : 66500000
[OAL] InitializeGPIO()
[OAL] InitializeCLKSource()
[OAL] InitializeCLKGating()
[OAL] InitializeBlockPower()
DCache: 128 sets, 4 ways, 32 line size, 16384 size
ICache: 128 sets, 4 ways, 32 line size, 16384 size
+OALArgsInit()
Arguments area has some values
-OALArgsInit()
+OALTimerInit( 1, 33249, 0 )
-OALIntrRequestSysIntr(irq = 38, sysIntr = 16)
[OAL] --OEMInit()                                                 //停在此处


开发板液晶显示花屏。
注：在Nand 上启动WINCE  正常。ActiveSync 工作正常。

请教飞凌公司工程师，
1 我的操作正确吗？
2 SD卡，读卡会有问题？
3 4G以上SD卡烧录软件是否成熟？