 In 1999 they won promotion to the "Primera Division" in a playoff with Cobresal, returning immediately to the "Primera B" the next year.Since then, the club struggles to show good results on the pitch with the notable exception of 2003 when they qualified to the Copa Sudamericana, having beating four First Division's teams in a row, only to lose against Universidad Católica on penalties, in the highly controversial second-leg match.In 2006 the club was turned into a "Sports' joint stock company".