How to create maintenance plan in SQL Server?

When I'm trying to create a new maintenance plan in SQL Server, it is showing this error:

TITLE: Microsoft SQL Server Management Studio
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'Agent XPs' component is turned off 开发者_运维问答as part of the security configuration for 
this server. A system administrator can enable the use of 'Agent XPs' by using   sp_configure. 
For more information about enabling 'Agent XPs', see "Surface Area   Configuration" in 
SQL Server Books Online. (ObjectExplorer)  

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You need to enable the SQL Server Agent extended stored procedures first by running the following.

sp_configure 'show advanced options', 1;
GO
RECONFIGURE;
GO
sp_configure 'Agent XPs', 1;
GO
RECONFIGURE
GO