what paper would i file if my childs mother is not following our court order and she lives in a different state

Three is not enough information to answer.  If the underlying court order is a Nevada order, then speak with a Nevada Family Law Specialist about enforcement or modification of the order to re-establish contact or take other steps.  If the order is from somewhere else, you need the same conversation, but you need to have it with a practitioner in the place with jurisdiction over the case.  If you can't tell the answer to that question, call a family law specialist here, with a copy of your controlling order in hand, and get the answer to the question "where will this case be heard?"