sql 2008

[mmno]

hey guys im trying to attach the datebase and i get this error


TITLE: Microsoft SQL Server Management Studio
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Attach database failed for Server 'USER-PC\SQLEXPRESS'. (Microsoft.SqlServer.Smo)

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ADDITIONAL INFORMATION:

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

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Unable to open the physical file "C:\My Server Files\Databases\AccountServer_Data.MDF". Operating system error 5: "5(failed to retrieve text for this error. Reason: 15105)". (Microsoft SQL Server, Error: 5120)

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BUTTONS:

OK
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can i get help from you please