I've moved my windows roaming profiles to new DSS server but now i received various errors when users login / logout from their clients.

Here some examples:

EventID 1000:
You do not have permission to access your central profile located at \\NAS01\Profiles\User. Contact your network administrator.

EventID 1000:
Windows cannot update your roaming profile. Contact your network administrator.
DETAIL - The process cannot access the file because it is being used by another process.

EventID 1000:
Windows cannot copy file C:\Documents and Settings\dbasta\My Documents\My Pictures\Desktop.ini to location \\NAS01\PROFILES\User\My Documents\My Pictures\Desktop.ini. Contact your network administrator.
DETAIL - The process cannot access the file because it is being used by another process.

What i can do to resolve this problem?