I have been trying to use PMPro 3.51 for about 3 years now. I have never been successful. Problems range from:
1. serial duplication of calendar events and tasks, with no reply from PocketMac technical support to resolve.
to:
2. PM taking over the CPU during attempts to synchronize, requiring complete shutdown and reboot to regain control.

I have had three, trouble tickets with them, none of which have been resolved satisfactorily, two of them were closed by PM without any resolution. The third requested me to perform specific procedures to record machine status during sync; when the data was recorded and sent, I never heard anything from them.

This appears to be a marginally successful product and a horribly supported one, at least for the version and PocketPC that I am using (Toshiba e740)