TAMPA - The developers of the failed Trump Tower Tampa just can't shake The Donald.

Their dream to build the 52-story downtown luxury condominium along the Hillsborough River died years ago, but their legal troubles live on.

Now, Donald Trump has sued four of the principals in the development company, SimDag/Robel LLC. Trump sued the group in 2007 for unpaid fees and for not completing the tower.

A settlement agreement was reached in that case, but the defendants have stopped making payments, according to a suit filed Thursday in U.S. District Court in Tampa.

"It's our effort to recover what the defendants have already agreed to pay," said Trump's attorney, Chris Griffin, of Foley & Lardner. "It's really that simple."

Parties named in the suit are Frank Dagostino, Robert Lyons, Patrick Sheppard and Jody Simon. Each, according to the suit, owes Trump $13,448. With fees that continue to accrue, Trump wants each of them to pay nearly $63,500 plus attorney costs.

Efforts to reach the defendants for comments were unsuccessful.

Trump Tower was announced in early 2005 and quickly attracted buyers and publicity. The developer, however, wasn't able to get financing for the $300 million tower. Also, it was determined that the soil at the site was unstable, and some buyers backed out.

This suit is just the latest in the Trump Tower saga. Last month, 30 individuals and companies filed a joint lawsuit against The Trump Organization and Donald Trump, saying they were duped into thinking Trump was building the tower. Later, they found out he had only licensed his name.

Meanwhile, the waterfront land is vacant. SimDag filed for Chapter 11 bankruptcy protection. The land fell into foreclosure, and Colonial Bank, which financed part of the project, ended up taking it back in July.