 Despite its low yield, their calls to the selection were not integrated and the preparation of the Selection Sub pre-23 to compete in pre-Olympic to be held in Chile.During the tournament pre Sudamerican Sub-23 in Chile, Soto wished for his return to Chile but this time not played by Santiago Wanderers, he took part in the Chile's most popular soccer club, Colo-Colo. Soto came to the club for six months on loan as a reinforcement for the Copa Libertadores in 2004 where they failed to pass through to the first round.Colo-Colo was unable to pay him well and in nine matches where only two single achievements were made before his former club, Santiago Wanderers.