Bios Boot Loader的错误,请斑竹及各位高手来帮忙啊,谢谢!

按照PB帮助文档作的BLDR,NK.bin也可以通过网络或者在终端运行,PB是5.0的版本.
以下是错误信息:
Microsoft Windows CE BIOS Bootloader Version 2.2 (Built Mar 13 2004)
WARNING: code=0x7.
WARNING: code=0x13.
WARNING: code=0x7.
WARNING: code=0x7.
WARNING: code=0x1D.
WARNING: code=0x7.
INFO: code=0x37.
WARNING: code=0x7.
ERROR: code=0x8.

换了个4.2的BLDR错误信息变成了:
ERROR: Unknown file system ().
ERROR: FAT initialization failed.
但是我的电子盘是FAT16的啊.
BLDR是从启动软盘或U盘用mkdisk弄到电子盘的.