SQL Server 2008 R2 { An Error occured when attaching database(s) }

Question

Hello Guys!
I just installed SQL Server 2008 R2 a couple of days ago, on the first day use i can attach database(.mdf) with out any problem.
on the day 2, i keep getting this error:
http://img515.imageshack.us/img515/14/1212i.png
TITLE: Microsoft SQL Server Management Studio
An error occurred when attaching the database(s).  Click the hyperlink in the Message column for details.
BUTTONS:
OK
after clicking the Hyperlink this window open:
http://img34.imageshack.us/img34/8766/hyperg.png
TITLE: Microsoft SQL Server Management Studio
Attach database failed for Server 'STARGAZER-PC\SQLSTARMAX'.  (Microsoft.SqlServer.Smo)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.50.1600.1+((KJ_RTM).100402-1539+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Attach+database+Server&LinkId=20476
ADDITIONAL INFORMATION:
An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)
Unable to open the physical file "E:\New folder\DataBase.MDF". Operating system error 5: "5(Access is denied.)". (Microsoft SQL Server, Error: 5120)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=10.50.1600&EvtSrc=MSSQLServer&EvtID=5120&LinkId=20476
BUTTONS:
OK
in that day i reinstall SQL Server 2008 R2, because I'm so confused. after that i try to attach i still got the same error, what i did is i share the folder where the database is.
i open SSMS and try to attach and i attached without any error...
i think this is the 4rth day, untill now everytime i want to attach a database i got this error, and even i try to share the folder where the database is i still got that error.
any advice guys?
Thanks a lot
jhules
if you want to be happy, find something you love to do and do it for free, then find someone to to you for it.

Answer 1

The Error clearly shows that MDF files and LDF files are not matching or LDF file is corrupted.
You can follow either of the one option below
1. Restore a recent backup rather attaching the MDF file
2. Attach  single MDF file without LOG File( Warning: All the log transactions will be gone and new log file will be created)
EXEC sp_attach_single_file_db @dbname = 'AdventureWorks2008R2',
    @physname = N'C:\Program Files\Microsoft SQL Server\MSSQL10_50.MSSQLSERVER\MSSQL\Data\AdventureWorks2008R2_Data.mdf';
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