Help!! magnetic field between magnets

Hi guys,

I want to see the magetic field distribution between two cylinder magnet posts.

I tried to use Maxwell 3D to see the field. I chose two simo24 magnets and made a magnetic return path, and then tried to see the magnetic field between magnets. (Please refer the pic.)

I put a non-mode sheet between two magnets, but maxwell doesn't allow to see the field . I cannot think out other ways to see it. Could anyone experienced help?

Also I tried to use CST (barelly used before, heard of that it works for physics issues). However, I cannot even find any magnet materials, faint!

I would appreciate of any minor help.

Thanks.