I've successfully migrated AP to LAP mode and connected them to a new WLC 4402.
I've also installed WCS software.
Into WLC logs I see no errors.
Into WCS I see every 15 minutes, one error for any LAP, that indicate that that LAP is disassociated from Controller, but in controller no signal about this problem.
AP 'ap-190' disassociated from Controller ''.
Every thing into wireless networks seems to work fine.