I can't tell what the problem is, but here are two hints for debugging:

1. Output the filename somewhere in your script, it would be good to know what make_filename() did.
2. make sure the form your data is coming from has enctype set to "multipart/form-data".

--
Brigitte    'I never met a chocolate I didnt like'    Jellinek
http://www.horus.com/~bjelli/         http://perlwelt.horus.at