A Houston law firm cannot file 34 more lawsuits against Enron after the high-flying company's financial collapse, the 5th Circuit ruled.

Fleming & Associates has represented hundreds of plaintiffs against the failed energy company, but Judge Prado agreed with the district court that the statute of limitations on the latest group of cases had expired.

The lawsuits would have covered 1,200 clients and would have alleged state law claims of fraud, negligence and civil conspiracy. Prado ruled that the district court did not violate "any notions of federalism" by determining that the state court would dismiss the claims as untimely.

"The district court is intimately involved in the many facets of litigation surrounding the Enron collapse," Prado wrote. "Further, federal courts often consider issues involving a state statute of limitations."