Creating a form in Dreamweaver

[admin]

using Dreamweaver MX. I have a problem with the form. I want to be able to make a form and have the data collected saved to a text file on the web server to be grabbed at a later time. I do not want the info mailed to me. I have made the form and in the property inspector I see an action box. WHat do I put in the action box. I was told to put the command send to:. I put this exactally...... send to:form.txt . After I do that then upload the page to web server it does not work. I fill out the form and hit submit. I am then sent to the page form.txt with a 404 error message. Can someone please explain what I need to do, thank you