I am hosting a server for a group of friends including the lion king mod, flans mod (with all add ons) carpenters blocks mod, chisel blocks mod, and project red base, project red illumination, and code chicken core. After starting the server (with no problems starting the server or people joining) my friends began to complain that the lamps disappeared after placing them down, along with the stack of lamps they were holding. Help please!

Must be something wrong with your setup. No one else has has this issue. If items are disappearing, try editing the configs, could be an id issue.