Het is all opgelost :
"1. Delete pairing for both devices
2. Initiate the pairing from the phone, go to the Bluetooth menu > add device
Instead of clicking Add, click More option on the right function key
3. Select Computer from the list
4. This should find your Mac
5. Once paired start iSync and add device, it should display a window with 3 tick boxes on for address, iCal and internet connection "