These achievements prompted the switch to professional football, which occurred in 1964, concurrently with the extension of membership from the Southern Football League. Wimbledon finished second twice out of the team's first four outings in this competition, before again winning three consecutive titles from 1975 to 1977. The club won election to The Football League after these successes, and thus entered the Fourth Division for the first time in 1977–78. Wimbledon took only ten seasons as a Football League club to reach England's top flight, winning promotion to the First Division for the 1986–87 season; Wimbledon then beat League champions Liverpool 1–0 in the 1988 FA Cup Final to achieve the feat of having won both the FA Cup and its amateur equivalent (as of 2009, only one other club – Old Carthusians – has done this). Wimbledon remained in the top division until 2000, when the side was relegated. The club announced an unpopular relocation to Milton Keynes in 2001, which received permission a year later, causing the foundation of AFC Wimbledon by the majority of Wimbledon fans, who called it "the death of [their] club". The club subsequently relocated to Milton Keynes in September 2003, and rebranded itself as Milton Keynes Dons in 2004.