I just cant understand what is wrong with my Nokia 6600. It syncronizes and after a while looses all the calender data. I try to resycronize and it says last sync does not match the one on the PC and if I want to start from scratch. I click yes the PC syncronizes with the phone but no data is on the phone. I had to completely reset the phone to 0. Resulting that it works but after a day the data is gone again??????