CREATE TABLE table_14225409_1 (reg_season VARCHAR(255), playoffs VARCHAR(255), us_open_cup VARCHAR(255))
What was the regular season standings for the year when the playoffs reached the conference semifinals and the team did not qualify for the US Open Cup?
    
SQL: SELECT reg_season FROM table_14225409_1 WHERE playoffs = "Conference Semifinals" AND us_open_cup = "Did not qualify"