Falklands or Malvinas?

In February 2010 Argentine gained an important diplomatic victory. During the meeting in Mexico heads of all the Latin American states have unanimously adopted the declaration supporting the Argentinean claims for the disputable archipelago. “Argentine cannot be deprived of the right to possess the Islands” — said Brazilian President Brazilian President Luis Inácio Lula da Silva, voicing the shared position of more than 30 countries of the Western hemisphere. It is an obvious failure of the British Foreign Office. Who is to be blamed?
http://www.eastwest-review.com/article/falklands-or-malvinas-part-i-britain-haunted-series-diplomatic-failures