when I connect my pearl to my desktop, it begins the sync process with outlook and will notify me of my changes i have made. whenever i click accept to the changes for my calendar/tasks updates, it tells me "unable to write or update application data". What do I need to do to fix this problem?

Corrupt task or calendar entry perhaps - you'll have to dig and try to find it. I've only encountered this problem with contacts (can't have blank contact, needs to have something in one of the first last or company name field)

Good luck!

I too have ran into this issue before and it has always been a blank contact entry or on entry missing a first and/or last name to mirror what Andi said.