Since the legal solution hasn't worked for you, I suggest that you try the counseling or mediation route. You state that your ex is "mad" at you. I recommend that you offer to go to counseling with the express purpose of allowing her an opportunity to have you really hear why she is mad at you. It has been my experience that counselors and mediators are able to do far more in bringing families to the ability to speak with each other about their children than Courts are. Your legal option is to bring a motion to have her found in contempt. In my state, her willfully and continually denying you parenting time would be grounds for a change of custody. Also in our state, the Court administrator has the modification of custody forms online for parties to do themselves. You may want to check with court administration regarding forms. Finding an experienced family law attorney in your state and spending the money for a consultation regarding your chances of getting a custody modification would be money well spent. Good luck.