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I want to recover some parameters from my NAND flash by using saveenv and loadenv but It does not work

First I have used a big env0 partition to be sure bad blocks don't bother me.

devfs_add_partition("nand0", 0x00000, 0xF0000, PARTITION_FIXED, "env_raw");
dev_add_bb_dev("env_raw", "env0");

Then I try to edit,save & load /env/config

wrs-02:0B:AD:C0:FF:EE# edit /env/config

And if I reboot barebox I still load the default environment