on the insert page, at line 64, 92 and 106, you have set the file name to be blank:
'FileName' => "",
change that to:
'FileName' => "[FileName]",
on each of the lines mentioned above.
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.