I am interested in learning database programming, so your link to the tutorial piqued my curiosity.

In your connection string, I think there should be a space in Data Source and an Id in User Id.

Also, you are writing data from four different fields into the same TextBox (TextFirst).

I should add; when you post code, if you wrap it in [CODE] [/CODE] or [HIGHLIGHT=vb.net] [/HIGHLIGHT] tags, it is easier to read and easier for people to spot mistakes. There are buttons that aid in doing this that can be found above the post message text area if you select the Go Advanced option.