Thanks for that Mark.
I was looking at my phpinfo.php page and my HTTP Headers Information Section had the following information
HTTP Request GET /phpinfo.php HTTP/1.1
Accept image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/msword, application/vnd.ms-excel, /
Accept-Encoding gzip, deflate
Accept-Language en-ie
Connection Keep-Alive
Should i put text 'application/pdf ' in the HTTP Request section?