If all you missed was one payment, then just pay it. The best way to avoid trouble is pay off the arrearage (including interest) prior to trial date. If I were you, I would borrow money from any source that I could (family, friends, 401(K), credit cards) and sell any items I could to raise the money and just pay it off. If you have done absolutely everything possible to pay it off, you are not going to be found in contempt and sent to jail. But you must do EVERYTHING and be able to show the court all that you did.
Please see this story: http://www.baumbach.org/b2evolution/blogs/index.php/2011/09/02/p1789
