[U-Boot] Facing the problem with yaffs2 from uboot

Hi,

Iam using SMDK6410 arm11 board having the samsung Nandflash with a capacity of 1Gb.Iam not able to load the yaffs2image on to the Nandflash from uboot by the command nandwrite,yaffs.Though the command works well ,the data is not added to Nand flash.Iam using uboot-1.1.6 version and kernel-2.6.28.6.Please Can you suggest on it.

WithRegards

V.Balaji