S60 Central locking automatic problems
 

Hi everyone!
my s60 2003 got a problem which causes empty battery in 24-48 hours after locking cars doors by central lock.
When a car doors are locked, after 1 minute it locks them all again. After 5 minutes it tries to lock doors all day-night long all the time 1 time per 1 second till energy of the battery is empty.
How can i fix it and where is the problem?