AMC simulation problem.

as in attachment, the AMC simulation are done as below:
i) simulate all the AMC structure as in vacuum
ii)simulate all the AMC structure as in PEC/copper
iii) simulate all the AMC structure as in particular material.

the attachment will help to explain, i hope you guys can assist me. thanx a lot

may i know where is the problem?
i don think the VBA coding is wrong, because..the coding is work [my senior use it too]
just need to change some particular info in coding, thats is like fmin, fmax, phase, bla bla...that is depend on our rseuly

maybe some of the causes happen because of my arg [probe] is periodic?
my frequency of interest for AMC is 3.5 GHz