help with membership level settings plz

hi,

I have a problem to set membership levels on my site. I set a free member and called it "guest". In the access levels I added negative rule to 5 pages. Then I activated this level and In options I set "guest" for the the "stranger settings". Now i log off, go to my site as "guest"/"stranger". All pages marked in negative rule are visible. Can you explain what do I do wrong? Thanks a lot.