Chicksen was offered a new deal last month by manager Karl Robinson but despite several meetings with the player's representative, the contract remains unsigned.
The 22-year-old academy graduate has made 42 appearances for Robinson's side this campaign helping the Dons to ninth in the npower League One table, but whether he will be with the club at the start of next season remains up in the air.
Robinson told MK News: "He's still not signed it. I've had five or six meetings with his agent now.
"We'll have to wait and see what he wants to do. He's got a future at this football club, but I can't twist his arm to sign."