How can i burn my *.flash file into the flash

I have a *.flash file,now,I want to burn it into the flash at the address of 0x100000 . I use the nios2-flash programmer,the command line is :

nios2-flash-programmer --base=0x100000 --input=altera_nios_dev_board_cyclone_1c20.sof --input=filesys.flash

but the output is:

Aug 6, 2004 10:55:36 AM - (??) nios2-flash-programmer: Launching Quartus Progr

mer to download:

altera_nios_dev_board_cyclone_1c20.sof

Aug 6, 2004 10:55:52 AM - (??) nios2-flash-programmer: Error opening target ha

ware

Aug 6, 2004 10:55:52 AM - (??) nios2-flash-programmer: Unable to open flash

evice after successfully communicating

with target.

It is likely that you are using a flash-programming FPGA design which

was not created for your target board.

In order to program flash, you must first create a purpose-built

flash-programming design (i.e. FPGA configuration) and associate it with

your particular board. The Nios development kit is delivered with purpose-b

lt

flash-programming designs pre-built for several development boards. If you

sh

to program flash on your own board, you must first create a flash-programmin

design.

The process of creating a flash-programming design for your board is mostly

automated. From a bash-shell, execute this script:

mk_target_board --help

what's wrong with me?