When I click the Configure Data Source for SqlDataSource2 in the Common Tasks Panel, step 3 tells me to select the "WroxUnitedConnectionString". But when I select the "WroxUnitedConnectionString" and click Next it gives me the error:

An attempt to attach an auto-named database for file C:\BegASPNET2\Chapters\End\Chapter07\App_Data\Wrox United.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located in on UNC share.

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Can anybody help me get pass this step?

Ok I had to change the path name to the database that is located in Ch.8 folder in the web.config.

Related link here: http://p2p.wrox.com/topic.asp?TOPIC_ID=39830