[CentOS] Printer-Problems - addendum

The whole error message from kmail was:

A print error occured. error message received from system:

cupsdoprint -P 'HP_Business_Inkjet_1200' -j 'file:///' -H 'server:631' -U 
'admin' -o 'copies=1 multiple-document-handling=seperate_documents-collated-
copies orientation-request=3' '/tmp/kde-admin/kdeprint_QEMVFUIL': execution 
failed with message:

client-error-not-authorized

Timohty