Error while using amorphous cell

Hi,

I am tring to pack cyclodextrin molecule between two silica (SiO2) layers. When I try to use amorphous cell module and load Cyclodextrin molecule, the job fails with an error msg: unable to load the molecule in 1000 steps. I tried increasing the number of steps but still error is there. Is it possible to use amorphous cell for cyclodextrin molecule since its cyclic and large? or there is another way to confine it between two silica layers?

Regards,

Deepali Sharma