TALLAHASSEE, Fla.  Nearly two years after a Florida congressman abruptly resigned over sexually explicit messages he sent to a teenage House page, law enforcement authorities here have concluded there is “insufficient evidence” to charge him with breaking Florida laws.

Commissioner Gerald Bailey of the Florida Department of Law Enforcement, who was asked in September 2006 to look into the conduct of the congressman, Representative Mark Foley, Republican of West Palm Beach, said Friday that investigators were hampered by Mr. Foley’s refusal and that of Congress to grant them access to Congressional computer files.

The department was investigating whether Mr. Foley violated Florida’s computer child pornography and exploitation law, and a state law banning the transmittal of harmful material to minors via electronic equipment or devices.

“F.D.L.E. conducted as thorough and comprehensive investigation as possible considering Congress and Mr. Foley denied us access to critical data,” Mr. Bailey said in a statement. “Should additional information arise which is pertinent to this case, we will ensure it is appropriately investigated.”