CCS烧写uboot问题

各位好，新做的8168板子，使用DDR3（H5TQ2G83FFR）2G，

                                       nandflash使用的是K9F2G08U0M，

                                      使用CCS_5.x用合众达的560plus仿真器，

         加载完GEL文件后，加载nand-flash-writer.out时，报出以下错误：

CortexA8: Output: DDR3 SWLEVELING DONE FOR EMIF1
CortexA8: Output: DM816x EMIF Init is Done @ 796MHz Clock Rate.....
CortexA8: GEL Output: Startup Complete.

CortexA8: GEL Output: GEL Reset
CortexA8: File Loader: Data verification failed at address 0x80007FF2 Please verify target memory and memory map.
CortexA8: Unable to terminate memory download: NULL buffer pointer at 0x3a9f
CortexA8: GEL: File: D:\dm8168_debug_doc\CCS_5.x_download_uboot_to_nandflash_dm8168__2014-08-20\nand-flash-writer.out: a data verification error occurred, file load failed.
CortexA8: GEL Output: GEL Reset

请大家给些解决的思路，谢谢！