Thnx 4 reply. I found the problem - it was probably bad BWA file, which I generated (I did it 1st time and I probably did something wrong). I donwloaded BWA from i-net and it works. Copy is made and I tried it - everything ok.
But I don't know, what I did wrong during generating BWA - I used BWA Biulder (the latest version, which is on the homepage). After biulding BWA it shows message "done" and I found BWA files on the desktop. I thought, that the file is OK, but probably wasn't. Weird