Do currency boards increase the credibility of exchange-rate pegs?

After massive attacks against the peso in January 2002 the Argentine government abandoned its currency board arrangement. The collapse of the Argentine exchange-rate system initiated a new discussion about the pros and cons of currency boards. Why did the Argentine currency board fail? What does its collapse reveal about the conditions that have to be fulfilled for a currency board to function smoothly? What consequences can be drawn from the Argentine case with regard to the currency boards of countries in central and eastern Europe?