"EXEC sp_addlinkedservers 'ITCHY', N'SQL Server'"

There is no "s" in sp_addlinkedserver command.

Or use openrowset, for example.

SELECT a.* into Test2

FROM OPENROWSET('SQLOLEDB','tstsql01'; 'yourloginid' ; 'yourpassword' ,

   'SELECT * FROM northwind..orders') AS a