Burma, Laos attend first ASEAN meeting as members KUALA LUMPUR, July 21 (Reuter) - Burma and Laos on Monday attended their first meeting of the Association of South East Asian Nations (ASEAN) as a full member of the grouping. The countries will be formally admitted to ASEAN at a special ceremony on Wednesday, on the eve of ASEAN's annual foreign ministers' meeting. ASEAN presently groups Brunei, Indonesia, Malaysia, the Philippines, Singapore, Thailand and Vietnam. Burma's admission has been harshly criticised by the United States and other Western nations, who want Burma isolated for its military rulers' human rights record and crackdown on pro-democracy movement. ASEAN has maintained that its policy of "constructive engagement" was the best way of reforming Burma's military rulers. "As far as constructive engagement is concerned, we are practising it as of now," Malaysia's foreign ministry Secretary-General, Abdul Kadir Mohamad, told reporters at a meeting of ASEAN senior officials. Senior officials from ASEAN countries are meeting to prepare an agenda for the foreign ministers' conference on Thursday and Friday. Cambodia had also been expected to be admitted to the group at the ceremony but ASEAN postponed its membership after a bloody coup in which Second Prime Minister Hun Sen overthrew First Prime Minister Prince Norodom Ranariddh. Cambodia still has observer status.