A controversial settlement proposal that would enable the promoters of a Rosemont casino to sell their interests to Las Vegas-based MGM Mirage Inc. for $615 million, has been rejected by the Illinois Gaming Board.

Illinois Gaming Board Administrator Philip Parenti Friday confirmed the board has decided not to approve the proposed settlement agreement, but is considering a counter-proposal.

"The board has rejected the current MGM proposal and is considering its own counter-proposal which is encouraging a process where other candidates can participate as part of a settlement agreement, including MGM," he said.

Mr. Parenti declined to provide details. But sources said one option might be to limit how much Chicago-based Emerald Casino Inc. could make on a sale.

Under the proposed settlement brokered by Gaming Board Administrator Mr. Parenti in January, Emerald and its investors would have made more than $455 million from the sale of its interest in the stalled Rosemont casino project while donating an additional $160 million to state coffers.

Emerald, controlled by the father-son team of Donald and Kevin Flynn and backed by a cross-section of politically connected investors, saw its plans for Rosemont derail last year when the Gaming Board rejected its application to transfer the license from a failed Galena-area casino to the suburb.

Representatives from both MGM Mirage and Emerald on Friday said they hadn't heard of the board's decision.

"There is a willing seller and a willing buyer and we hope to at some point in the near future find a resolution that's acceptable to the Illinois Gaming Board," said Emerald CEO Kevin Flynn.

Larry Suffredin, an attorney with Chicago law firm Shefsky & Froelich Ltd. who is representing MGM Mirage said, "At this point we have lawfully binding contract with Emerald and I hope this doesn't cause further litigation."