A parents problem
What kind of problems is she giving you? It may help to know that in the middle of a custody battle, or whatever it is exactly that you're going through, there are a lot of high emotions. In time, once things are decided and a routine is established, generally the emotions subside and sharing a child gets easier.
Feel free to open up and describe what's going on. A lot of us ladies here have been jaded because our ex's have primarily only cared about the money, so then they try to pretend they want more time with the kids to get a custody order and support order in place, only to turn around and refuse a lot of their actual parenting time and still complain about how much support they're paying.
Let's assume you're a caring dad and really just want to be involved. How old is the child? Are you married or living with the mom? Recently separated? What was the court hearing about? We can't really support you unless you tell your story.
Stay involved in your child's life. Document any money spent on your child, support given to mom(though it is generally not a good idea to provide support until ordered. You may end up paying more than you had too, or can afford.) and any time caring for your child so mom can work.
Really? My ex looked good for providing support before he was ordered to do so. The magistrate commended him for doing so. We used our state's child support calculator to determine the appropriate amount.