[U-Boot] change autoboot

Newbie with question: uboot is currently configured to autoboot with "run boot_nor". In the configuration I found a variable called BOOTCOMMAND which is set to "run boot_nor". Which I now want to set it to "run prog_all_usb; run boot_nor" I then recompile everything transfer u-boot to my device and on initial startup it works but if I turn my device off and back on it and interrupt autoboot and type "printenv". The bootcmd is set back to just "run boot_nor" - what am i missing??????????????

Thanks