KUALA LUMPUR, Malaysia (AP) _ A French rock climber's plan to scale the world's tallest building has hit a wall.

The managers of the Petronas Twin Towers say they will not allow Alain Robert to climb up the glass-and-steel facade of the 88-story building, despite government approval.

Robert's first attempt to go up the building ended last week when police pulled him in through a 60th-floor window and charged him with trespassing. The charges were later dropped.

Following appeals by a youth organization, the government said Robert could climb the 1,483-foot tower on Wednesday. But Kuala Lumpur City Center Holdings, which manages the towers, disagreed.

``The fittings are not designed to support human weight,'' KLCC Holdings chief executive Hamzah Bakar was quoted as telling the Star newspaper.

Robert, 34, has scaled more than 30 tall buildings around the world, including the Empire State Building, earning him nicknames such as ``spiderman,'' ``madman'' and ``human fly.''