I am running Windows XP and office 2003. Some months back my 8310 just did not want to sync with oulook anymore and it keeps saying "unknown error". When it comes to up- or deleting files or pictures, thats no problem.At that stage i was using desktop version 4.2 which i uninstalled and re-installed. Did not fix the problem. Then is installed version 4.3(did not work) and now trying 4.5 but still no luck.
When i sync with someone elses computer their is no problem, so it has to be a setting on my pc.

Would appreciate any help

Is this your PC or a company PC?

DM 4.7 and 5.0 seem to be the best version. Make sure that you have completely deleted the old version and then reinstall the newer one. I would install without Roxio. That could be one problem. Also make sure DM is properly configured.