What can I do to prevent Icad from "freezing" when I insert another drawing? I have had this problem before but gave up, but now its bugging me. while I try to use drawings made by other people.

I had to add this detail, Icad only freezes when trying to work with the inserted drawing when the esnap is active, is there a fix for this?, I tried changing the drawing into a block, thinking the block would be seen as one entity, and wouldn't hang, I was wrong it still hangs.