Burma News: THAI SECURITY CHIEF -"NO ENTRY FOR BURMESE EXILES"; U.S. SECRETARY OF STATE RECEIVES DR SEIN WIN; SLORC TURNS DOWN DAB PEACE TALK OFFER; THAILAND CRACKS DOWN ON BURMESE ACTIVISTS; FOUR ARMED BURMESE ARRESTED IN BANGKOK; BURMESE STUDENTS ARRESTED AT RIGHTS SEMINAR; International Action: U OF TORONTO HONOURS DAW AUNG SAN SUU KYI; JAPANESE ACTIVISTS VOW TO STOP BURMA DAMS; Foreign Trade &l Investments: UPDATE: FOREIGN FIRMS IN BURMA -9;