Hi Charlene,
I would recommend being persistant with your tapping. Tap several times per day. You might consider surrogate tapping at times when he does not want to do it and using some of these phrases:
Even though...It is scary/I'm afraid/there's monsters or ghosts in here/someone wants to hurt us/I'm frustrated/I'm not safe/I'm afraid something will hurt me, Mom, Dad, sibling, pet, my stuff, etc./I have to protect everyone/I'm the only one who knows so I have to take care of everyone else/I'm anxious/I saw something scary on TV/I don't understand it/it doesn't make sense/it's too scary to be alone/it's all up to me...
Then, tap on anything new that should come up. Let us know how this works.