So thanks guys for responses. I fought that I have to change some bootloader options. If I boot from NAND I cant use fw_printenv. there is no fw_printenv in /usr/sbin/fw_printenv, so I made an another new usb drive debian installation, played with environment options and after some time boot successfully. you have to change with fw_setenv that variables: usb_scan_1=usb=0:1 dev=sda2 usb_scanby papazol - uBoot
I'm not shure that forum I should use but I have a problem with creating a separate boot partition on debian. So I installed debian with doozan script on my usb mass storage. mount it on my pc, created an ext2 partition as the first one on it, moved all /boot stuff there, created a symlink ln -s . boot (so uBoot can find all the stuff in a boot directory on the first partition), created aby papazol - uBoot