Why do one-off appointments not backup from my Blackberry Bold 9700 calendar to Outlook?

I only use my Blackberry Bold 9700 for phone, texting, contacts, calendar, photos, notes, tasks, memos etc. I do not use it for email. I need to copy ALL my contacts, calendar and data entries onto Outlook 2010 on my computer. I am using Blackberry Desktop software version 6.0 bundle 2949. I try to copy all the info one way from BB to computer. I want ALL the BB calendar and contacts to be visible and safe on my computer. I have also tried downloading the latest version of the Blackberry Desktop software onto my friend's computer but the same problem occurs. Only the recurring appointments are saved onto the computer. The one-off appointments are still on the Blackberry Bold 9700 but are not visible on Outlook calendar, although I am looking at Show High Detail. All the contacts do seem to copy across OK as far as I can see. I get a Synchronization Error message
CRTranRec::GetLinkedRecordID:Invalid linked record Id
at the end, visible on the computer when I try to copy across the calendar and contacts.