How does child support work ?

Are wages automatically deducted from his check or does he have to manually make a payment ? We've already got the court order, he was supposed to begin paying child support in April but on the website it says no payments have been received... However the balance he's supposed to be paying is sitting in arrears... He doesn't help me with shit so I really need this little bit of money to help with my baby. I know if it's not being pulled from his check then he probably won't pay what he's supposed to be paying.