Error in Taking EHP 6 backup using Sql Server Management Studio

Hi friend , I want to take  backup EHP 7 at Network location .

I have Read/ Write Permission to that location.

But SQL Server Management is giving following error.

TITLE: Microsoft SQL Server Management Studio

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Backup failed for Server '#######'.  (Microsoft.SqlServer.SmoExtended)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=11.0.2100.60+((SQL11_RTM).120210-1917+)&EvtSrc=Microsoft.SqlServer.Management.Smo.ExceptionTemplates.FailedOperationExceptionText&EvtID=Backup+Server&LinkId=20476

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ADDITIONAL INFORMATION:

System.Data.SqlClient.SqlError: Cannot open backup device '\\serv###\SAP_Media_and_Backup\Backup\$$\$$.bak'. Operating system error 5(Access is denied.). (Microsoft.SqlServer.Smo)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=11.0.2100.60+((SQL11_RTM).120210-1917+)&LinkId=20476

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BUTTONS:

OK

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