Keates, who saw his side suffer their third defeat in five league games, admitted that he was disappointed as his side conceded two goals during the opening nine minutes allowing the Addicks to control much of the first-half.
The Walsall-born gaffer admitted that he was pleased with the Saddlers' second-half showing, especially as Andy Cook grabbed his eleventh goal of the campaign, but insisted that his team still have to cut out their errors if they are to earn the right to win matches.