If there is an existing order for child support through the Family Court and the Department of Child Support Services (DCSS), the case will not be heard in small claims. The proper court to enforce the order is the Family Court. You can bring a contempt OSC, but they can be procedural headaches. DCSS can do certain things to enforce the order (suspend driver's licenses, wage garnishments, bank levies, etc.). I would communicate with your case manager at DCSS is you haven't already. You can obtain private counsel if you wish, but DCSS is fairly effective in extracting support once they get a lead on where the money is.
Disclaimer: This answer does not constitute legal advice, and should not be relied on. Each state has different laws, and each situation is fact specific. Without an in depth consultation and analysis of all relevant facts and evidence, it is impossible to fully evaluate a legal problem. This answer is not intended to, and does not, create an attorney-client relationship.
If there's an order to pay you money, there's nothing to go to small claims court about; going to Small Claims, if you could do it (and you can't) would simply get you ANOTHER order that you be paid, but doesn't get you any farther in enforcing. Speak to Child Support Services.
Child support Debt Nondischargeable debt and child support Child support arrears Child support modification Child support and changes in circumstances Child support and unemployment Child support enforcement Enforcing child support by contempt Penalties for not paying child support Unemployment compensation Lawsuits and disputes Family law Contempt of court Small claims court