What my rights are or what I need to do to ensure that he has to comply to counseling to prove that he is reliable?

My ex-husband left while I was pregnant. He has seen our son 8 times in over 8.5 years. He lived in different states while I resided with our son. I recently moved after being granted change of domicile from both the court and my ex-husband. Now my ex-husband is filing a motion that I am violating parenting time. He has never made any attempt for visitation, in fact he failed to adhere to his visitation in the past. My son suffers from emotional and mental issues and is on medication. I am concerned that my ex-husband will not be a constant, which he will just disappoint and upset our son causing him to relapse in his psychological progress.