TYRE, NY -- The failure of the 11-month-old del Lago Resort & Casino to generate as much revenue as expected has prompted a major credit rating service to downgrade its financial outlook. Moody's Investor Service has dropped del Lago's rating from "stable" to "negative." In its report, Moody's warns that del Lago's poor performance could keep it from paying off the debts it owes to its lenders. Moody's does believe the casino can continue to pay the interest on the loans, at least for the next year. "Despite the fact that del Lago Resort Casino opened on time and on budget and has substantially grown total gaming revenues generated in its primary market area, the property's revenue ramp-up is well below Moody's expectations," Keith Foley, a senior vice president at Moody's, said in the rating report.