@razor
i don't think I get what your asking for; are you asking for evidence that Heaven does not exist?
This is kind of the problem, there's no way to prove unequivocally God and heaven don't exist. I don't disbelieve because of this kind of proof. I don't believe there is a God because of evidence that disproves the bible, because of terrible things that have happened, because of the things you can look around and see religion doing in the name of their God. All of this is evidence that the bible and these groups are lies. When the things that are supposed to be from God are all lies and there are evidence against them - in my mind that discredits God pretty heavily.
I highly suggest reading Undeniable by bill Nye. He explains some things that very heavily influenced my reasoning on God.