Houston ? Enron Corp.’s former investor relations chief said Monday he spoke, to no avail, with company founder Kenneth Lay and former CEO Jeffrey Skilling about investors’ concerns over murky financial disclosures months before Enron imploded in December 2001.

In his third day testifying in Lay and Skilling’s fraud and conspiracy trial, Mark Koenig said the obfuscation continued even as Enron disclosed massive quarterly losses in mid-October 2001, two months after Skilling had resigned and Lay had resumed the role of chief executive officer.

When prosecutor Kathryn Ruemmler asked him whether Lay encouraged him to always follow Enron’s code of ethics requiring candor, honesty and fairness, Koenig replied, “At times, no.”

But Skilling lawyer Daniel Petrocelli challenged the admitted liar’s credibility. Koenig pleaded guilty in 2004 to aiding and abetting securities fraud for lying to investors and is testifying under a plea agreement with prosecutors. He told jurors last week that before he cut the deal with the government, he lied to a grand jury investigating Enron because he hoped to avoid being charged with a crime.

“You’re still in a mode of trying to protect yourself, aren’t you?” Petrocelli asked.

“I don’t feel in the last three days I’ve protected myself,” Koenig said, noting that he faces shareholders’ lawsuits and will probably lose the $5 million he still has from his Enron days. He forfeited $1.5 million to the government as part of his plea.

He also acknowledged that prosecutors can recommend a lenient sentence if they are satisfied with his cooperation.

The defense has suggested that most of the 16 ex-Enron executives who pleaded guilty to crimes are saying what they believe prosecutors want to hear to avoid lengthy prison terms.