The government said FirstEnergy Nuclear determined that a contractor had established an unprotected high-speed computer connection to its corporate network that allowed the " Slammer " infection to spread internally .
It said FirstEnergy determined that a contractor had established an unprotected computer connection to its corporate network that allowed the so-called ``Slammer ' ' worm to spread internally .
" The panel told the U.S. to correct its flawed determination , " said Pierre Pettigrew , Canada 's trade minister , in a statement .