MTD in SPI FLASH error!

This is the problem I am currently experiencing:

I'm using a CYC3 which has :

- EP3C16Q240C8N

- M25P64 SPI FLASH for AS config device

- MSEL[2:0]=010

- QUARTUSII 8.0

in the "qsf" file define :

set_location_assignment PIN_24 -to data0_to_the_epcs_controller

set_location_assignment PIN_23 -to dclk_from_the_epcs_controller

set_location_assignment PIN_14 -to sce_from_the_epcs_controller

set_location_assignment PIN_12 -to sdo_from_the_epcs_controller

using uclinux(nioswiki)

change the config.c to:

#define EPCS_SPI_OFFSET 0x400 /* FIXME */

.

.

.

static struct flash_platform_data nios2_spi_flash_data = {

.name = "m25p80",

.parts = nios2_spi_flash_partitions,

.nr_parts = ARRAY_SIZE(nios2_spi_flash_partitions),

.type = "m25p64", /* depend on the actual size of spi flash */

};

and the other following the site : http://www.nioswiki.com/mtd

when I download to the board:

nios2-download -g zImage

nios2-terminal

the debug window display :

m25p80 spi0.0:found m25p80 expected m25p64

Am I missing something ?

thanks