Thanks.
The upload_max_filesize is 25mb so I don't think that was the problem.
I added the code to page and got the red line DW uses to highlight an error in coding (I think that's what it's for) for the line
ini_set('display_errors9'on');
I don't mind leaving it there if you say it's okay in case next time I have to send out a message I get the same problem.
Thanks, Jason. WA's support is fantastic.