My V3C can sync with my XP via MPT 4.x, but there are a few problems: 1. Events in V3C do not have default Ring Tone. It won't alert me with upcoming events unless I manually select a ring tone with the phone, and this has to be done with every event. So it defeats the purpose of synchronizing with computer and make calendar on the phone unreliable as a tool to depend on. I have made sure every type in Master Volume style has ring tone. 2. Sometimes subsequent recurring events do not get transferred to the phone. 3. Occasionally there are non-recurring events that won't get transferred. Any help will be appreciated.