electromagnetic simulation

Hi guys
Someone please give help to following simulation problems i faced

I simulated a honey comb installed on a enclosure on CST results are accurate
but FEKO gives not more than 80dB (shielding effectiveness)wheras CST gives upto 180dB.


On Hfss i am facing a problem which i could not solve, on my shielding problems when i place excitation like (plane wave or dipole ) the reading inside enclosure gives higher field outside is low although i gave excitation outside the enclosure i dont know where is the problem.
thanks
emc44

Hi EMC, i appreciate it if you send me your CST model or post it here to see how you calculated the SE.
Many thanks in advance.