Claus von Bu low's former lover says he asked her to lie about their affair at his first trial on charges of twice trying to murder his wife, according to court records released today.

He said that if Alexandra Isles admitted the affair she would be "putting nails in my coffin," the records show.

The records, of in-chambers conversations between the judge and lawyers involved in his retrial, also show that von Bu low wanted to cut off his now-comatose wife's life-support systems and feared he might not be able to inherit her millions if he divorced her while she was in a coma.

Von Bu low today declined to comment on the in-chambers allegations.

The charges were made by Isles to prosecutors who then presented them to Judge Corrine Grande to determine whether she could repeat them in open court.

Grande did not allow Isles, a former actress, to make those charges in court and instead, Isles testified that von Bu low told her he had watched his wife, Martha (Sunny) von Bu low, slip deep into a coma without calling for help for hours.

In the in-chambers session on May 28, prosecutor Marc DeSisto told the judge that Isles had been asked by von Bu low to lie about their two-year affair at his first trial.

When Isles told her lover that she could not deny their relationship on the witness stand, von Bu low told her "if you testify that we were more than friends, you will be putting nails in my coffin," DeSisto said.

The prosecutor said the two had a similar conversation a second time while driving down New York City's Henry Hudson Parkway and that he had written her a letter asking her not to testify.

In the letter, he said that if she refused to testify, he would help her get a job in Europe as an actress.

DeSisto said Isles also told him that von Bu low wanted to have the life-support systems keeping his wife alive disconnected.

"He indicated to Isles that he was trying to persuade the children to do that, to go along with him because it would have been Mrs. von Bu low's wish," DeSisto said.

DeSisto told Grande that according to Isles, while she and von Bu low were in the Bahamas, he "prepared some sort of a document and showed it to her, gave it to her, which had the law on whether or not if someone divorces his wife in a coma, he can take inherit under her will."

Isles, 39, made a dramatic 11th-hour appearance last month to testify against the man she once wanted to marry.

Von Bu low is charged with twice trying to murder Sunny von Bu low by injecting her with insulin, in December 1979 and again a year later, leaving her in an irreversible coma.

The state has charged that the 58-year-old Dane attempted to kill his wife so he would be free to marry Isles and inherit $14 million from his wife's estate.

Grande has not allowed any testimony before the jury about a possible financial motive for the alleged murder attempts and yesterday she ruled that the will itself cannot be placed into evidence.

Without the motive of financial gain the prosecution must depend on Isles' testimony that she gave von Bu low an ultimatum six months before Sunny von Bu low's first coma that he marry her by the end of the year.

Isles fled the country in March to avoid testifying and only returned to take the stand when Grande would not allow her testimony from the first trial to be read to the jury.

The jury in the two-month-long trial is expected to begin deliberations on Friday after lawyers present their closing arguments Thursday, Claus and Sunny von Bu low's 19th wedding anniversary.

In court today, Grande rejected a defense request to acquit von Bu low on the two attempted murder charges. She also rejected a corollary motion to dismiss the first count based on a lack of prosecution evidence.

Chief defense attorney Thomas Puccio argued that von Bu low could not be found guilty on the first count because the black bag in which the defendant allegedly kept needles and drugs was not found until after the first coma.

But Grande said the prosecution witnesses showed von Bu low "had the tools, he had the means, he had the opportunity and he had the motive" for each of the alleged crimes.

The defense motions came after the jury heard testimony from Dr. David S. Rosenthal, a blood expert from the Harvard Medical School and the state's lone rebuttal witness. Rosenthal challenged a contention by a defense expert that Sunny von Bu low's enlarged red blood cells after the second coma were caused by alcohol. Rosenthal said the problem was caused by nutritional deficiency.