(nydn) Boxing promoter Don King's son may be one of New York's best-known deadbeat dads, but city officials say they can't help his daughter because they can't find him. It took the Daily News a day to get Eric King on the phone. "This is child abuse," said Ana Carril-Grumberg, King's former girlfriend and Nathalie Carril-King's mother. Unable to pay the bills, Carril-Grumberg and Nathalie, 17, are facing eviction from their tiny rundown midtown apartment. "There are lots of struggling parents like me," Carril-Grumberg said. "Imagine how hard it is for them, when Nathalie has a famous grandfather and they can't even get child support for her. The laws are there, but no one enforces them." Carril-Grumberg wants King to pay a court-ordered 4 a month for food, college applications and clothes - but that's too little for any city, state or federal agency to bother hunting him down. And while the city's Child Support Enforcement Agency boasts about collecting 0 million last year through automated tracking, a third of deadbeats still aren't paying support, cheating more than 85,000 children out of 0 million, city officials concede. A complicated judicial system and lazy workers make it hard for single parents to get child support, they charge. "It is a system in disrepair," said William Silverman, a U.S. prosecutor who tried King. In 2000, King, a wealthy Dallas mortgage broker, was jailed under a rarely used federal law that criminalizes deadbeat parents who skip states to avoid paying for a year or more than ,000.