Impossibel to delete, rename or any operation on files and folders

I just migrated 400Gb of files from a WIn2008 file server to a brand new Win2012 file server.

After using robocopy to copy files and permissions, i changed the tree of folders  but some folders are innacessible.

C:\DADOS\ARQUIVOS\COMPARTILHADA\30 - DIVERSOS\z\POB ANUAL 2011>attrib
File not found - C:\DADOS\ARQUIVOS\COMPARTILHADA\30 - DIVERSOS\z\POB ANUAL 2011\*.*

C:\DADOS\ARQUIVOS\COMPARTILHADA\30 - DIVERSOS\z\POB ANUAL 2011>icacls *.*
POB OUTUBRO 2011: Access is denied.
Successfully processed 0 files; Failed processing 1 files

If i try to robocopy an empty folder, the errors are:

"Access is denied." and "The process cannot access the file because it is being used by another process."

C:\DADOS\ARQUIVOS\COMPARTILHADA\30 - DIVERSOS\z\POB ANUAL 2010>attrib
File not found - C:\DADOS\ARQUIVOS\COMPARTILHADA\30 - DIVERSOS\z\POB ANUAL 2010\*.*

C:\DADOS\ARQUIVOS\COMPARTILHADA\30 - DIVERSOS\z\POB ANUAL 2010>dir
 Volume in drive C is DISCO
 Volume Serial Number is 0CC3-8694

 Directory of C:\DADOS\ARQUIVOS\COMPARTILHADA\30 - DIVERSOS\z\POB ANUAL 2010

25/06/2013  14:28    <DIR>          .
25/06/2013  14:28    <DIR>          ..
25/06/2013  14:28    <DIR>          POB NOVEMBRO 2010
               0 File(s)              0 bytes
               3 Dir(s)  2.670.616.760.320 bytes free

No one is using the files (i checked with net files and openfiles)

ANy tips?