PhoneTools 3.25 and sync problems

I run Phonetools 3.25 on my Win2k sp4 and E398.

For some reason the sync of the calendar fails every time. Phonebook sync:s
alright (most of the time).

Any idea how I could solve this? Is there a trial ware of the full version
I could try? Is it a hardware och software problem?Should I get a Bluetooth
adapter for my computer and try the Bluetooth connection?

I'm prepared to pay for something that works.

thanks!