Problem with "entity-activation-range"

I have problem with entity on my server: when friend are playing on server, and go away from home,entitys from vanilla and mods (for example IC2) bake, extractor, compressor and other stuff - it’s stop working and start again when he’s back or near. When i come to server (i am operator) everything work fine. In global.conf “entity-activation-range” i pointed “false” bit it didn’t help. If anyone has encountered such a problem, I would like to ask for help.

EDIT: problem is solved. When we go far away, chunks unloaded and resources were not processed. We installed the mode “ChickenChunks”