YANGON: A prison court in military-ruled Myanmar adjourned the trial of Aung San Suu Kyi for another week Friday, her party said, as UN chief Ban Ki-moon visited the country to press for her release.

The court at the notorious Insein jail in Yangon said it had not received a copy of an earlier Supreme Court judgement barring two defence witnesses, said Nyan Win, spokesman for her National League for Democracy (NLD).

Opposition leader Aung San Suu Kyi faces up to five years in jail if convicted of breaching her house arrest after a bizarre incident in which an American man swam to her lakeside house in May.

"Daw Aung San Suu Kyi attended the trial this morning but the court said that as they haven't got the case from the Supreme Court the trial is suspended to July 10," Nyan Win told AFP.

The Supreme Court on Monday rejected an appeal by her defence team to reinstate two of her four defence witnesses, both senior members of her party, upholding an earlier decision by the trial court.

One defence witness, a legal expert, has already testified. Aung San Suu Kyi's lawyers earlier this month successfully appealed against a ban on a second witness, who had been expected to testify on Friday.

The prosecution has so far called 14 witnesses, adding to opposition and international claims that the proceedings are a show trial designed to keep the democracy icon locked up ahead of elections scheduled by the regime for 2010.

UN chief Ban Ki-moon arrived in Myanmar earlier Friday to press the head of the ruling junta, Senior General Than Shwe, to free political prisoners including Aung San Suu Kyi.

The Nobel laureate has spent 13 of the past 19 years in detention since the regime refused to recognise the NLD's landslide victory in the country's last democratic polls in 1990.