MS SQL2005 and SQL Server Managemenrt Studio Express

Hello, This is about installing the Northwind and Pubs Sample Databases on the MSSQL 2005 Database with SQL Server Management Studio Express. I obtained a CodeProject HOWTO Install the Northwind and Pubs Sample Databases instruction and receivedthe following Error after clicking on the Attach Databases Window and clickingADD inthe right pane of the Attach Databases window.. Failed to retrieve data for this request. (Microsoft.SqlServer, Express.SmoEnum) The Execute Permission was denied on the object'xp_fixdrives', databae'mssqlsytemresource', schema 'sys' Error 229.

I am operating from a Vista Business.
Can you assist me?

Codeproject URL
http://www.codeproject.com/KB/database/InstallingNorthwindAndPub.aspx

Regards, column2