According to: http://en.wikipedia.org/wiki/Yugoslavia
The country was formed in 1918 immediately after World War I as the Kingdom of Serbs, Croats and Slovenes by union of the State of Slovenes, Croats and Serbs and the Kingdom of Serbia. It was commonly referred to at the time as the "Versailles state". Later, the government renamed the country leading to the first official use of Yugoslavia in 1929.
The Kingdom of Yugoslavia was created by France and Great Britain, aimed at curbing the German expansion in the Balkans.
After the WWII country became known as
:The Socialist Federal Republic of Yugoslavia (SFR Yugoslavia or SFRY).
After the fall of the Berlin Wall and the consequence collapse of communism,ceased to exist motive of creating this state, simultaneously serbian element in the federation sought to take primacy and steer the country towards Russia.
So for these two reasons and others this artificial state can not continue to exist.