thanks for helping me... but its seems my motherboard network adapter was broken or something, problem was in it, because modem and cable was working fine. It's driver
was updated in 11.04.2012 and problem came now.. so I had to buy new network adapter.. and now my internet is working. I should have gone to PC store, right after I didn't get it work. ~8h doing something what I can't fix... -.-"