mandriva does not allow to create ,rename,move file & folder on ntfs partition.
Have you checked your permissions and the permissions on the NFS server?
To create, move, ... you need the NFS server to offer the share as read/write (rw) and not read-only (ro).
You might also like to have a look what the permissions are on files and directories on the NFS share and if you are in the appropriate user/group.
Last but not least, check your fstab file to see what permissions are set there.
Hope this helps.