用CRT下载文件到开发板时，进度不动

##### EmbedSky BIOS for SKY2440/TQ2440 #####
Press Space key to Download Mode !

#####    Boot for Nor Flash Main Menu   #####
[1] Download u-boot or STEPLDR.nb1 or other bootloader to Nand Flash
[2] Download Eboot to Nand Flash
[3] Download Linux Kernel to Nand Flash
[5] Download CRAMFS image to Nand Flash
[6] Download YAFFS image to Nand Flash
[7] Download Program (uCOS-II or TQ2440_Test) to SDRAM and Run it
[8] Boot the system
[9] Format the Nand Flash
[0] Set the boot parameters
[a] Download User Program (eg: uCOS-II or TQ2440_Test)
[b] Download LOGO Picture (.bin) to Nand  Flash
[l] Set LCD Parameters
[o] Download u-boot to Nor Flash
[r] Reboot u-boot
[t] Test Linux Image (zImage)
[q] quit from menu
Enter your selection: 1
USB host is connected. Waiting a download.

Now, Downloading [ADDRESS:30000000h,TOTAL:222998]
RECEIVED FILE SIZE:  222998 (217KB/S, 1S)

NAND erase: device 0 offset 0x0, size 0x40000
Erasing at 0x20000 -- 100% complete.
OK

NAND write: device 0 offset 0x0, size 0x3670c

Writing data at 0xf800 --  29% complete.



这个是CRT中的操作和显示结果，恳求大虾帮忙，我特意用的开发板自带Uboot下载到我的256m NandFlash，屏为W35，谢谢

解决了么？
格式化nandflash，再烧写