support court. motion was dismissed due to a failure to carry burden of proof
Lawsuit / Dispute Attorney
You should probably discuss with an attorney who can help you cure the defects, but you may be able to move to reargue, and/or appeal. You may have very short time limits in effect to do anything, so meet with attorney asap.
File an appeal...if you're within 30 days of the order.
Divorce / Separation Lawyer
You need to file objections to the order as soon as possible. There is a very short window of opportunity in which to do so. You need to consult with an experienced attorney to determine if there are grounds for a reversal and why the court found that you failed to meet your burden of proof as the petitioner.