yahoo calendar sync issue

hi,
i've had my curve for about a week. really great. trying to sync my calendar first with my palm desktop. used the 'switch device' wizard, but only my repeated events and holidays migrated. none of the individual 'one off' events. so then, wiped my blackberry calendar, exported my palm calendar, imported into the yahoo online calendar, and synced my curve with that. same exact results. so that leads me to the handheld as opposed to either software calendar being the problem. it's probably something simple, but i can't seem to find the solution. any help would be greatly appreciated.
thanx,
GeoM