Sql Server 2008 Error Failed to retrieve data for this request. (Microsoft.SqlServer.Management.Sdk.Sfc)

Very strange. I was trying to attach a database using my 'sa' account which was detached before with some other account. I got this error.

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TITLE: Microsoft SQL Server Management Studio

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Failed to retrieve data for this request. (Microsoft.SqlServer.Management.Sdk.Sfc)

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

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ADDITIONAL INFORMATION:

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

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CREATE FILE encountered operating system error 5(failed to retrieve text for this error. Reason: 15105) while attempting to open or create the physical file  (Microsoft SQL Server, Error: 5123)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.00.1600&EvtSrc=MSSQLServer&EvtID=5123&LinkId=20476

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BUTTONS:

OK

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Finally, I opened another instance of SQL Management studio and used my regular windows authenticated account to attach and it worked magically.

I understood the reason after it. Basically the 'sa' account is the Sql server account which need not have access to my File system. So it is obvious !