[Yaffs] yaffs on 2.4.26

    I am trying to get yaffs working on my board.

    The Configure is:
    CPU: Samsung S3C44B0X ( ARM )
    OS: uClinux with kernel 2.4.26
    MTD: mtd-snapshot-20040912
    yaffs: downloaded from aleph1 CVS 20040928
    NAND Chip: Samsung K9K1G08U0M ( 128 MByte )

    The problem is: I can not copy large file to the yaffs( e.g about 320k ) when I config yaffs as CONFIG_YAFFS_USE_GENERIC_RW, and smaller files is ok. However, if i don't use the CONFIG_YAFFS_USE_GENERIC_RW option, lager file is ok, but if i launch other program when operating yaffs( e.g. 
cp test.wav /mnt/yaffs &
ls
) the console shows "BINFMT_FLAT:reloc outside program 0xce20ce2(0-0x20294/0x19500), killing ls!"

    can anyone help me?

Regards
Dich Chen