SQL server Restore Error

I got this error when trying to restorea database from the SQL Server Management Studio..

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

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ADDITIONAL INFORMATION:

The media family on device '\\tup03srv32\Backup\SQL\tup03srv06\WSS_Content_backup_201006100000.bak' is incorrectly formed. SQL Server cannot process this media family.
RESTORE HEADERONLY is terminating abnormally. (Microsoft SQL Server, Error: 3241)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=09.00.1399&EvtSrc=MSSQLServer&EvtID=3241&LinkId=20476

Then I run the restore command via Query Editor and it worked!

RESTORE DATABASE [WSS_Content] FROM DISK = N'\\Tup03srv32\backup\SQL\tup03srv06\WSS_Content_backup_201006100000.bak' WITH FILE = 1, MOVE N'WSS_Content' TO 'c:\evrak\WSS_Content.mdf', MOVE N'WSS_Content_log' TO N'C:\evrak\WSS_Content.ldf', NOUNLOAD, REPLACE, STATS = 10 GO