Vista - mac problems.. any suggestions

hi, i've been a big foldershare fan for years.. its a great product!
recently i'm running into more and more problems with error messages saying
files cant be deleted or moved.. and files not being synced at all. nothing
on my setup has changed that i'm aware of. Anyone else having these problems
or suggest a fix? this is the best solution i've found to backup and keep
things synced.. but if it continues to fail i'm going ot have to move on to
another product.

thanks
Darrell