My husband pays his child support every month, and provides the court ordered insurance. He is to get his children every other weekend. Now, the ex-wife said he couldn't have them on his weekend, and the children got on phone, and said they were not coming over. Can the ex-wife be charged with not complying with the court orders set up by the county?

You can take her back to court if you wish, if it was just one weekend, likely the judge will not do anything yet, but after a pattern. You would take her back to family court for contempt of court, often it will have to happen several times before the judge takes it very serious.

Was there something going on, did you ask her to give you the next weekend in exchage, what was her reason for this

Also what state is this ? Some states if she tries to violate the order you can get the police involved. The reason being is its kidnapping if she refuses.