NEW : Online ticket sales are banned for the show . The ` ` Michael Forever Tour '' is schedule for Cardiff , Wales , on October 31 . Jackson , Jermaine and Randy object to the show 's cancellation . Los Angeles ( CNN ) -- A planned Michael Jackson tribute concert , supported by the late pop star 's mother and four siblings , was in disarray Thursday amid family squabbling and the apparent failure of promoters to sign any big-name acts so far . ` ` Nothing can be announced until '' contracts are signed , a spokeswoman says .
NEW : Online ticket sales are banned for the show . The ` ` Michael Forever Tour '' is schedule for Cardiff , Wales , on October 31 . Jackson , Jermaine and Randy object to the show 's cancellation . ` ` Nothing can be announced until '' contracts are signed , a spokeswoman says .