I was trying to add a .mdf file to my App_Data folder At this time I am getting an error like this
"Connections to SQL Server files require SQL Server Express to function properly. Please verify the installation of the component or download from the URL: http://go.microsoft.com/fwlink/?LinkID=49251"
What should I do such that, I should be able to view newly created data base in my server explorer, But must not cause harm to any existing data base ?

.net sujith