EZSDK 5.04.00.11 8bit NAND support problem

Hi,

Today, I received EZSDK 5.04.00.11.

The release notes tells 8bit NAND supported.

So, I have tested samsung K9F2G08 (2Mbit) on my DM8168 EVM Rev.C. ( CS0BW is off )

But, uboot tells "No NAND device found".

Following is uboot's messages.

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U-Boot 2010.06 (Apr 29 2012 - 20:28:20)

TI8168-GP rev 1.1

ARM clk: 987MHz
DDR clk: 796MHz

I2C:   ready
DRAM:  2 GiB
NAND:  HW ECC BCH8 Selected
NAND device: Manufacturer ID: 0xec, Chip ID: 0xda (Samsung NAND 256MiB 3,3V 8-b)
NAND bus width 16 instead 8 bit
No NAND device found!!!
0 MiB
MMC:   OMAP SD/MMC: 0
*** Warning - bad CRC or NAND, using default environment

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How can I use 8bit NAND on my DM8168 EVM?