SQL server 2008 (SP2) doesn't appear in Server Explorer (for server name) in VS 2008 (SP1)

Hi all,
I have VS 2008 (with SP1) and SQL Server 2008 (SP2). I am trying to create a connection with my remote database, which is already registered in SQL Server 2008, in Visual Studio 2008; but Server Explorer cannot find SQL Server name.
Thanks for helping this.
 
David De
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