You have to delete the SRC-attribute. Visual Studio 2003 uses CodeBehind instead.
You find a tutorial here:
A little article describing the difference between Src and CodeBehind:
If you do not want to purchase VS, there are free alternatives.
Microsoft® Visual Web Developer® 2010 Express provides you with everything you need to start building standards-friendly Web applications
You want to store the values from your ASP.NET form into a database and repopulate the form when the user returns back.