Problems with sync and Thunderbirthday

[Greghack]

I can´t sync my Birthday-Calendar made by Thunderbirthday. When I synchronize I get the message "74 unresolved items", which are exact the numbers of birthdays in the calendar. If I disable the synchronization of this calender, I didn´t get the message.
I use Vista / Birdiesync 1.6.4.0 / Thunderbird 2.0.0.9 / Thunderbirthday 0.2.3 ans a Dell Axim X30 (Windows Mobile2003 SE).
The synchronization of Thunderbirthday and Birdiesync had already worked some updates before, but I can´t remember the update version, in which the sync had worked.
I know, that the problem exists already before version 1.6.1.0, and I hope, somebody could help me with my birthday list.

[Birdy]

Hello,

Could you tell me if you checked the option "link the calendar to the category of the appointment or the task" ? (it's just a question, you don't need to modify this option)
Thanks.

[Greghack]

Hi,
yes, the option ist checked.

[Birdy]

I think that it's the "read only" state of your Birthday calendar which causes the problem. BirdieSync cannot write events in this calendar while synchronizing.
Another user had a similar problem. You may checkout this thread.