Xerox network accounting (JBA) C70 sending accounting users

I am trying to send a list of users to the Xerox for network accounting purposes.

I successfully do this with 2 Xerox models (XEROX WorkCentre 7556 and XEROX WorkCentre 7830), following sudo code in PHP:

functionSendUsersToXerox($ip,$users){    $url="{$ip}/acct/set_auth";    $auth='account:jbaserve';    $post="+aaav1.0\n+purge\n";foreach($users as $u){        $post.="+u\"{$u->login}\"\"{$u->code}\"\n";}    $ch = curl_init();    curl_setopt($ch, CURLOPT_URL, $url);    curl_setopt($ch, CURLOPT_USERAGENT,'EQ Device Control Engine');    curl_setopt($ch,CURLOPT_POST,1);
    curl_setopt($ch,CURLOPT_POSTFIELDS,$post);    curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);    curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT,5);    curl_setopt($ch, CURLOPT_FRESH_CONNECT, TRUE);    curl_setopt($ch, CURLOPT_TIMEOUT,5);    curl_setopt($ch, CURLOPT_USERPWD,"$auth");    curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);    curl_setopt($ch, CURLOPT_HTTPHEADER,['Content-Type: application/xrx-acct-data']);    $data = curl_exec($ch);    $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);    curl_close($ch);//  echo "HTTP CODE: {$httpcode}<br/>";//  echo $data;}

This code works perfectly on the above named Xerox's but fails on the C70 with a 401 error and the following message:

Invalid accounting authentication version

Network accounting is enabled on the device, and I can collect all jobs from the printer at the URL acct/get_acct

If I pass in bad post data I get a different error message:Click here

HTTP Return400TheRequest had invalid syntax

I can't find any references to JBA or Network Accounting anywhere and am not sure how to find out if the format has changed on set_auth or if it's version difference that needs to be set.

I know there are differences in the get_acct output that does point to a different version of the accounting.