M.3.
I know how frustrated you feel. I too have a 5 yr old daughter, who does not want to sleep in her room. I talked to her and she said she is scared. Together we made her room comfortable and cute. We decorated her bed with her favorite babies. I bought a fish tank, we keep that light on for a night lite. Maybe if you ask him what he would like. Do alot of what he suggests.
Hopefully that will help, Good luck!