IPP and xerox 78xx

hi,

we are having issues on all xerox 78xx models

when printing from mac, mac uses default IPP printing , when you do a test page , the jobs stay in queue on mac with message "access denied"

when you choose LPD as protocol it works, but we want to use IPP

when we do the same test from windows, print on an IPP port, job ls also in error

same setup on other xerox models like 93xx, printing works

IPP protocol is offcourse enabled on webinterface

93xx and 78xx are loaded with the same firmware, latest spar release xxx.14201

any ideas?