An architectural firm and construction company has accused the Rangers and owner Tom Hicks of failing to pay $6.9 million for more than three years' worth of work. In a lawsuit, RTKL Associates Inc. and Vratsinas Construction allege that they are owed the money for work on a proposed development near the Rangers Ballpark in Arlington. "In the end, the effort of many, many people was such that $6.9 million was invested by the plaintiff group and they were not paid," John Nassen, an attorney for the plaintiffs said.