Robocopy failing on NTUSER.DAT file

I am trying to 'Robocopy' user profiles from our 'old' Domain Controller, to the new one (old = Windows 2003, new = Windows Server 2008 X64).  When I use Robocopy, it fails on the NTUSER.DAT file, saying access is denied.  This only happens for users with the Windows 7 Operating System.  Users with an older OS do not report an error.  We can copy those over and then change the profile path in Active Directory.  

Any assistance offered would be greatly appreciated.  


regsampAsked:
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PberSolutions ArchitectCommented:
Yikes, you will probably end up with issues trying that.  2008 has changed the way it processes and handles users.  Documents and Settings have changed to User, etc.

My recommendation would be to use the USMT: http://technet.microsoft.com/en-us/library/dd560801(WS.10).aspx
It will handle the migrations much better.
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Gerwin Jansen, EE MVETopic Advisor Commented:
Are the users that you can't copy the profile from logged on? NTUSER.DAT is probably opened because they are logged on at the moment you're trying to copy.
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regsampAuthor Commented:
I think it is what you suggested gerwin because we copied some during the night without issue.  We have not had any issues so far Pber and this method was suggested by a few different experts.  Any known issues you have seen?  
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Windows Server 2008

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