Wirelessly posted (BlackBerry8700/4.1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/100)
Take a look at the intelisync settings. Look at the configuration of the calendar sync by editing the calendar sync. It most likely is set to update only for 2 weeks or so. Contacts, I would suggest you verify that the contact settings are set for full sync.