no nand devices

Hi there,
Yesterday i received the CCCC on debug UART and I have uploaded the u-boot-spl.bin and u-image.bin by UART Xterm and YTerm as per http://processors.wiki.ti.com/index.php/AM335x_U-Boot_User’s_Guide .
The U-boot menu comes up but if I try to flash MLO and u-boot.img to nand I receive “no nand device”. Where is the NAND ???

Here the boot log

U-Boot 2014.07-rc2-00002-gf23adc9-dirty (May 25 2014 - 21:44:14)
I2C: ready
DRAM: 512 MiB
NAND: 0 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
*** Warning - readenv() failed, using default environment
Net: not set. Validating first E-fuse MAC
cpsw, usb_ether
Hit any key to stop autoboot: 0

U-Boot# nand device
no devices available

what board do you use?