Playing with freind in a custom map?

skipperlink

L1: Registered
Aug 4, 2015
41
8
Hi! im trying to play with some of my freinds on a map im working on for there input but i can't find anyway for them to play with me. they already have a version of the map in there maps folder and all that. but i cannot get them in a custom server with me. any help would be appreciated!