SELECT "year" FROM table_204_463 WHERE "open cup" = '2nd round'
what was the only year that division 4 qualified 2nd round of the open cup ?
CREATE TABLE table_204_463 (
    id number,
    "year" number,
    "division" number,
    "league" text,
    "regular season" text,
    "playoffs" text,
    "open cup" text
)