Re-attaching databases after upgrading to SQL Server Enterprise Edition

Since Upgrading from SQL Standard Edition to SQL Server EE we have been unable to re-attach the database files that we detached before the upgrade, to SQL Server Management studio. We get an error message that reads:

TITLE: Microsoft SQL Server Management Studio

Failed to retrieve data for this request. (Microsoft.SqlServer.SmoEnum)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&LinkId=20476

ADDITIONAL INFORMATION:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)

CREATE FILE encountered operating system error 5(error not found) while attempting to open or create the physical file

Any help with this matter would be truly appreciated. Thank you.

You need to reset the NTFS permisions on the physical files. SQL 2005 locks out the physical files NTFS permissions when the databases are detached.