Attaching uploaded file to email for download

Hi Guys

Me again: I'm trying to allow for a file to be downloaded or sent as an attachment in an email. I would prefer the attachment, but can live with the download link. I found a script that does it here - but when I click on the link in the email it tells me that:
You are not authorised to access this file in Zoho Creator. Go to Home

Can you guys help with this?

Thanks,

Jason