I removed all the files early on to see if I could upload without overwriting originally. I have now ftp'd a file to the server and this can be accessed under the navigation 'Entry Forms' - 'Collectors Corner'. I have just tried this and it downloads successfully.
I have now re-inserted the [FileName] and I have added the error reporting to the top of the page - I presume you mean before the 'require_once'?
I've also made a copy of the last few server errors to see if this might assist you.
I have just tried it again with all this in place and it concluded with a blank page and nothing!!