WQAM-AM 560 shock jock Sid Rosenberg’s in the dog house!

Rosenberg, who landed in South Florida after getting fired twice from the Don Imus show for making insensitive racial and sexist remarks, is serving a six-week suspension without pay.

He allegedly attempted what radio biz folks call “plugola,” three sources tell Gossip Extra.

Plugola, which is illegal and a Federal Communications Commission violation that could cost a station its license, is when a talk-show host is paid without the station’s approval to promote a product on the air.

“The good thing is that we caught it before he did any damage,” said a station official who asked to remain anonymous. “Sid made an agreement to plug a sport-betting website he owed money to. My understanding is that he had $100,000-plus in losses with the site.

“He received a fax at the station spelling out their private agreement, and Sid forgot it in the fax machine. Someone found it and brought it to our attention.”

Rosenberg, 44, is due back in the studio Jan. 2.

When asked why he is not working, Rosenberg text-messaged: “There’s no story. Nothing brewing. Stop listening to the scumbags at 790 (WQAM’s rival station, 790 The Ticket, which Rosenberg left in 2009 to join WQAM) and a few jealous losers on the street.” Rosenberg stopped replying when I asked him about the fax and the plugola allegation.

And WQAM Program Director Lee Feldman said: “We’re not commenting on what happened with Sid, other than saying he’s taking personal days.”

Rosenberg’s disappearance raised eyebrows in sports talk circles because it happened during the high-revenue football season.

Former Miami Dolphins stars Channing Crowder and O.J. McDuffie as well as Steve Isenberg and Steve Goldstein have been rotating in Rosenberg’s seat.

PRISON BREAK

Before there was Bernie Madoff and Scott Rothstein, there was Laurence Isaacson.

The Weston stockbroker, 64, was convicted in a Miami federal court last year of defrauding hundreds of local investors in connection with the collapse of the $200 million Lancer Hedge fund.

Isaacson was supposed to surrender to start serving a three-year sentence Dec. 2 but the court postponed that date until Feb. 19.

Why? For a slew of reasons, according to court papers filed by his attorney: So that he can spend the holidays with his family; file his tax returns for 2011; help the missus move because their home is in foreclosure; and take on the “monumental task” of preparing his incarceration.

AND FINALLY . . .

. . . The two principals in a SoFla media scandal that exploded when the Boca Raton-based National Enquirer turned the tables on Dateline reporter Chris Ha nsen, of To Catch a Predator fame, are still paying professionally. The tabloid caught Hansen allegedly cheating on his wife with West Palm Beach TV reporter K ristyn Cadd ell. Six months later, Caddell’s name was quietly wiped off WPTV’s website. I’m told she’s no longer with the NBC affiliate, although no reason for her departure has been given. And Hansen was passed over for the big promotion to Dateline anchor for Lester Holt.