Digital File Pro uploads not working on update page

I have tried numerous times to get this working. Created the admin pages in an old version of Data Assist and Digital File Pro and updated to latest version of Data Bridge to see if that would sort things out but still not working. All other elements update the database fine but the two digital File upload elements and just wiping out what is in the database and leaving it blank. The Digital File Pro elements on the insert page work fine.

Have added the debug code to the page and this is what I get:

Warning: Cannot modify header information - headers already sent by (output started at /homepages/23/d371597157/htdocs/admin/varieties_basic_Update.php:9) in /homepages/23/d371597157/htdocs/admin/varieties_basic_Update.php on line 164
POST:
array(13) {
["var_name"]=>
string(4) "Bute"
["var_status"]=>
string(4) "Live"
["European"]=>
string(1) "1"
["Hot"]=>
string(1) "1"
["var_season"]=>
string(8) "Maincrop"
["Description"]=>
string(667) "
Bute has been selected for its strengths in the white pre-pack market. It produces high yields of bold, uniform bright tubers. When boiled or mashed, consumer feedback has confirmed Bute?s cooking qualities as smooth textured with a desirable flavour.

High Saleable Yield

Bright attractive skin finish

Excellent shape and size uniformity
"
["pdf_update"]=>
string(11) "marvel3.pdf"
["var_pdf"]=>
string(0) ""
["image_update"]=>
string(11) "kestrel.jpg"
["var_image"]=>
string(0) ""
["WADAUpdateRecordID"]=>
string(1) "3"
["Update_x"]=>
string(2) "55"
["Update_y"]=>
string(2) "10"
}

FILES:
array(0) {
}


and further down the page I get:


MainStatus object: WA_UploadResult1
statusCode : 0
errorMessage : No file uploaded
clientFileName :
fileExtension :
serverFileName :
serverSimpleFileName :
serverDirectory :
contentType :
fileWasOverwritten :
fileWasSkipped :
fileWasRenamed :
fileSize : -1
isImage :
imageWidth : -1
imageHeight : -1
WA_UploadResult1_1:
clientFileName :
fileExtension :
serverFileName :
serverSimpleFileName :
serverDirectory :
contentType :
fileSize : -1
imageWidth : -1
imageHeight : -1
statusCode : 0
errorMessage : No file uploaded
Status object: WA_UploadResult2
statusCode : 0
errorMessage : No file uploaded
clientFileName :
fileExtension :
serverFileName :
serverSimpleFileName :
serverDirectory :
contentType :
fileWasOverwritten :
fileWasSkipped :
fileWasRenamed :
fileSize : -1
isImage :
imageWidth : -1
imageHeight : -1
WA_UploadResult2_1:
clientFileName :
fileExtension :
serverFileName :
serverSimpleFileName :
serverDirectory :
contentType :
fileSize : -1
imageWidth : -1
imageHeight : -1
statusCode : 0
errorMessage : No file uploaded



Have attached the php page

Thanks in advance for your help.

Craig