It was a brief respite for Jeffrey Skilling.
A judge Tuesday rejected the former Enron chief executive's request for bail pending appeal of his sentence for conspiracy, fraud and insider trading.
The Fifth U.S. Circuit Court of Appeals had ruled this week that Skilling could remain free until it decided on his request.
Skilling is now required to report to a low-security federal prison in Waseca, Minnesota, to begin serving his 24-year sentence.
U.S. Marshal's spokeswoman Marianne Matus says Skilling is expected to surrender today in Minnesota. Since he is out on bond, he can report to the prison on his own.
In yesterday's order, Judge Patrick Higginbotham noted "serious frailties" in Skilling's convictions.
But he says those problems fail to raise a "substantial question" likely to result in the overturning of all Skilling's convictions, as would be required to grant bail during appeal.