Is the page you are adding the form to a dynamic PHP Page?
The form function will only be available on Dynamic pages.
you pressing submit produces an error, what does the error say?
please provide more details.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.