Basecamp Email Attachment Not Working Properly

Basecamp Email Attachment Not Working Properly

It's quite hard to explain but I have a support form that allows users to
submit a request and attach a file, the request gets sent straight to
Basecamp, as well as sending various confirmation emails to my team, here
we can view all details the user submitted in the form as well as download
the attachements. However, on Basecamp it shows the file attachment in the
heading/title but does not let you download it:
Code:
$subject3 = "Todo list: WRS ID: $theData - $subject - $country - $name -
$now - file: $fileatt_name";
$subject5 = "Files";
Output:
WRS ID: 1361 - minor change on category page - UK - Karina M - Wednesday
October 02nd, 2013, 12:37 pm - file: matress_category_sept_2013.docx
Although it does upload it in Basecamp as a seperate task, where you can
download the attachment? Is there something im missing from my code above
to allow the attachment to be downloaded from here also?