Alert Profiles No attachment option

Hi all

For some reason recently my Netflow analyzer alert profile has stopped e-mailing attachments. Basically what we have is alert profiles on each WAN interface that sends us an e-mail plus a pdf attachment when the WAN link is hitting 90% capacity, this enables us to be on the front foot, also the pdf gave us the information at a glance that we needed to see what was using the bandwidth.

However now the alert profile I have had setup since day 1 is still sending us alerts but with no pdf attachment, also when I got to do a test alert profile I can't see the option to include an attachment in the e-mail.

Anybody got any ideas?