External memory

hi Guys.
I have simple starting board for C167CS-LM with AM29F400BB flash.
i use the Flashit 9 software for loading code in flash.this software use bootstrap loader method.
Can read data of flash and can erase flash but can't write data in to flash? where is problem?
the setting of register and hardware schematic:
SYSCON 0x0094
BUSCON 0x0668
RP0H 0xF8 BUS Address A16-A19 DeMux
www.uploadmb.com/dw.php please help thank you.

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