It may be any number of things: enforcement officials may not be able to serve notice on the non­custodial parent due to inadequate address information; if a hearing is necessary, it may take a while to get a court date. The demand for enforcement services is high and interstate pursuit is not a simple matter, but your caseworker is required to follow ­up on your case if 90 days have passed since the last contact with the child support enforcement office in the other state. Continue to keep in touch with your caseworker to resolve any delay or to provide any new information you may have.