I'm sorry, but we are going round in circles.
To clarify, I have reinstalled CS5 Dreamweaver, I have reinstalled FormBuilder. The computer is a new MacBookPro running an i7 processor, and OSX 10.6.5.
You have sent me a file called shared.js. This is meant to replace a file called shared.js with a path of leonardedmunds: Library: Application Support: Adobe: Dreamweaver CS5: en_US.
Neither in this location, or anywhere else on the hard disc is there any file called shared.js.
I attach a snapshot of the path you suggest on my hard disc. In en_US there is no WebAssist, no FormBuilder or CSSFormBuilder, and in no folder anywhere is there a file called shared.js. This is confirmed by my manually opening folders, as well as doing a Finder/Spotlight search. The only shared.js file was in the folder Dinamico. Initially, since this was the only shared.js file on my hard disc, I replaced it with the one you sent. I realised that this was not the correct folder, but since there was no other shared.js file, I gave it a go - to no avail.
I am not looking in the wrong place - the file and the WebAssist folders are simply not there.
And yet Form Builder works up until the point where it tries to insert a new Form on a .php page.
This is now taking an inordinate of amount of my time. And yet I really need to get this, the last page of a site, finished.