Coursepress Pro - File Download Links Identical - 0 Byte txt File

We've got some files to download, yet regardless of what file should download the download link is the same link : http://www.courses.rose-therapy.co.uk/?fdcpf= and then a 0 byte txt file is downloaded.

This is happening on a site wide, course wide basis, all download links are the same link!

The files in media library are all PDF's so for some reason it's just not taking the link properly and is displaying a an identical link for all downloads http://cl.ly/2r1e222H2z2c each of these links when hovered over shows the same link http://www.courses.rose-therapy.co.uk/?fdcpf=

Please can someone take a look asap, this client has already just suffered a 4 week delay on another coursepress issue so is losing the will to live.

Thanks

Shane