Problem SOLVED!!!
As I wrote the problem was product code. It was not changed from SWAP to product code for my region.
What is SWAP -> http://talk.maemo.org/showthread.php...829#post510829

When you flash with a diffrent product code (only N900) it is not automaticly changed like on other nokia phones. It needs to be done separately! Otherwise, when you scan phone in Phoenix it will always read as RX-51 SWAP even though you have flashed with a region product code.
Product codes for N900 -> http://talk.maemo.org/showthread.php?t=34193

So solution is to first change product code to your region in Phoenix with active media changed to USB in connection manager (you will need FPS-21, SS-46, FS-94, CA-101 and SX-4 available only in Nokia service center ))))) ) and then flash it with a sw for your region.
It is a 10min job and for now this can be done only in Nokia service center.

So Xizor, print this and go to your service ))))))))))))))))))