file manipulation with Design Extender package

Hi,

I created an update form for one of my web pages. I need to modify some of the fields so that a file can be uploaded to the server, replacing the old file.
I recently purchased Design Extender and how to accomplish file upload task seems to have changed a bit from before.

I followed the instructions found in the support section for adding file manipulation >upload file to my form.

attached is my file.
On this update for page, I can use the browse button and select a file to upload. The file name in the database gets updated okay.
But the file does not actually get uploaded to the directory on the server.
Right now I'm working on a local server.
I tried several different settings but am unable to figure out the problem. I need help.
Can you review my file. See attached.

Thanks for your help,
Danielle