s w briefcase vpn

Good afternoon --
I have a briefcase that contains files from my persnal network share at work. To sync it from home, I VPN to the office, connect to the share and try to Update All. Howver, on Vista, all I ever get are errors. Right now, I get "An unknown error has occurred. Some of your files were not copied."
Actually, syncing the briefcase at the office doesn't work, either, now that I think about it.
I simply do a Copy and Paste of the files I want in the briefcase after I first create it. This is the 3rd briefcase with which I get errors.
Thanks, Michael