Oh dear. I think there are some issues with this phone. See
>this< article. You may need to badger Palm about this.
I have found the "birthdays" function of Outlook's contacts database less than satisfactory in the past. I've had a Palm and I now have a WinMobile phone - fully synchronised with two PCs at once. I always ended up with lots of duplicated birthdays for some reason. Also, Outlook seems to handle birthdays slightly differently to any other annual recurring event. Goodness knows why.
Not that helpful to you now, but that "feature" may be best avoided.