you cant expect a breakthrough right away. the chemical needs to get into your system first and dont expect a fun tripping time from it either because if you do and you breakthrough she will scare the fuck out of you. I have seen it happen. you have to smoke it properly.
but of course theres the one in ten people wont ever feel anything due to the way thier brain is wired. but if you felt anything keep trying. and take biiiiiig hits and hold them for 30 seconds. after that just lay down, dont go walking around and shit.