Our Te^'t videoconference could not take off due to technical difficulties. My first thought was to blame Yahoo Messenger 5.5, a supposed improvement over the old YM that we used last year with about the same number of participants. However watching the news tonight I learned that since last night a vicious worm has been circling the globe in the internet servers and was causing traffic congestion. This may explain why we could not maintain a good voice channel. So, I am guilty of a hasty verdict with respect to Yahoo Messenger. Thanks to all the participants: LTVu, NTChi, VhViet, NTTu, NHLe, LVADung, LUThanh Tho^'ng